Guidance needed

[jangle]

I'm going to try to attach a link to a GunBroker auction that although is not the right Arsenal as a replacement stock for your rifle, it is the same style as what you are looking for. Notice the chatter in the stock at the wrist area. Long handguard with round cleaning rod retainer in stock. Look at both sides of the front bayonet lug, this rifle has a three screw front band, you will need the two screw band (if you google/search for 2-3 screw T-99 front bands you'll see the difference).
Japanese type 99 arisaka Bolt action 7.7 Mummed kokura ww2 not garand - Bolt Action Rifles at GunBroker.com : 881945721