Wanting to put away maybe an extra extractor and firing pin. Maybe recoil spring. Who has these? Will any ak74 fp or extractor work?

Any other parts I should stash?

KVAR should have those parts. That being said, I have yet to need any spare parts. My most used rifle has about 8 to 10k through it.

http://www.akfiles.com/forums/showthread.php?t=313507

I've got a ton of small parts I'm selling, the above is just a small sample - almost done with that lot.  I will put together a package of spare parts at a great deal, a whole lot cheaper than the retailers.    I have all the pins, springs, hooks, retainers, and a ton of other stuff.  

Shoot me an email and I will get you what you need for not much $.  

Chuck