any AKM grip should work, which is most of what is out there.
any ak-47 magazine should work.
Stock is going to be specific to a milled rifle. So be sure to look for that. You're going to be limited on who will have that.
Handguards will also be kind of specific. The lower handguard is slightly different for a milled rifle. The tab at the back in thinner and more narrow. The upper handguard should be the same.
Just make sure what ever you buy is for a milled rifle and you should be fine.