Late Winchester Carbine parts, what do I need??

I have a Winchester carbine ser.# 558xxxx. What would be the correct revision of stock/handguard, barrel band, and trigger guard. It also wears an Underwood Bolt.

A two rivet shallow groove handguard, most likely with a small "w." A type three low wood stock with oval cut oiler slot and a GHD over WRA (possible "w" in slingwell). Bolt would most likely be the flat variety with a "w" on the right lug if memory serves me right. The barrel band would be a type two most likely. The trigger guard or housing should be a type five with oil hole drilled in the left hand side. There's a chance the last two could be the earlier versions of parts. A 5.58 Winchester would be right at the change over for the later type parts. What rear and front sights does your Winchester have? That could determine if it's worth investing what could be quite a lot of money in parts.

Definitely type II or Type III rear sight and type II front band. I asked same questions about my 5.7 Winny:
Winchester rear sight question for those who know.
MY Winchester transitional Carbine: It's correct!

The oil hole trigger housing could be there or maybe not. I would look closely at the staking of the sight. If it came from the factory there should be two round punch hits at the right front and right rear of the sight. Definitely a type 2 band and flat bolt.

The receiver was stamped late January 1944. One reference says build was about April/May. Sight changeover to adjustable was fall 1944. Take Dave's advice and look at the staking. I'd say leaf sight.
Type two band mid to late 1944, type three late 1944 to the end of production. I would think type 2.
Round bolt marked W started in the spring of 1944. Mixed flat and round in your serial number range.
Trigger housing with lube hole started around mid 1944. Could be either.

Thanks to all for the help. A bit more info is in order from my end. I bought it at a Gun Show this past weekend. I researched it a bit more and found the following; It has a plainfield 20" barrel installed and sits in a plainfield stock with perf. steel handguard. It also has an IBM trigger guard. The butt plate is Winchester, as is the hammer, and slide. I have not checked the other trigger parts yet, and it has the flip safety. It has a Milled adjustable (Type 2??) rear sight marked "PI" and the front sight is marked "N" on top behind the blade. The slide is the later type where the hood sweeps forward.
I'm not really looking at a full return to original as it's obviously been rebuilt at one time, and the 20" barrel keeps it out of our Canadian (restricted) class, but I would like to at least get a proper stock/handguard/barrel band for it. The proper trigger guard would also be nice, but the bolt doesn't really matter at this point.

If it shoots good, and looks good, I'd leave it alone. An awful lot of parts (costly) to find and change.

In my post on my 5.7 Million Winchester, someone pointed out that in Carbine Club newsletter * 237 July 1995: first adjustable stamped rear sight marked I.R.Co. 7160060 was reported at 5,553,489. Now with manufactures using up what was on hand, we all know that there was mixed parts usage during the transitions. It could have had a flip or either a II or III rear sight. As for stock, mine has the CC stamp and the WRA over GHD stamp, which was from an earlier period. It was also pointed out by a more knowledgeable member that there are other known originals in that range that have both the CC and WRA over GHD. I guess there is no exact way to know....

I have a substantially original Winchester in the 5.598mil range. It was in an Inland stock/hand guard when I bought it almost 20 years ago, but I added a correct stock and hand guard. The barrel band is a narrow Type one, bolt is flat and it has a flip sight. The trigger housing does not have the later lube hole. The carbine's finish is original and in very nice, near excellent condition. I also have a 5.620mil Winchester that is substantially original as well. About the only difference between the two is the 5.6 has a Type 2 wide barrel band. Other than being in the wrong wood, neither of these carbines show any signs of restoration.