Could this be a Type 30 stock?

The bolt you could find on ebay in all likelihood. I've seen them there in the past. I however would not buy a bolt without having the action in hand. You have to be careful that they aren't trying to pass off a carcano bolt. They are similar but not the same and they are not interchangeable. ebay had been letting actions slide by for a while but I think they have figured this out now and are no longer allowing them to be sold. Some guys are still trying to get around the restriction by not showing the entire action on the photo making them appear to be cut. Depending on which state you live in this may or may not be legal to purchase in this manner. I live in a state which allows long guns to be sold between private parties.

The problem is, a lot of guys will not know what it is. They are going to look at photos and assume it is a carcano (which it is) but of the Italian variety. So there is a possibility they will be selling it as an Italian barreled action. The sights are a dead giveaway. Check Italian listings and look closely at the photos.