Mine (the lens screws) were M3x25's. I got them from fastenal for a dirt cheap price, like 2 bucks for 12 of them or something. When I picked up the order, they had given me 100 of them, because someone was too lazy to count out 12 and break up the lot, so I got 88 of them free.
If you want some, I'll send 'em to ya in a normal envelope in a baggie so it'll only cost a stamp for me, and nothing for you!
edit: These screws were for a 76 750K with stock lenses, so I'm not sure what else it would work with, but I'll send em if you want 'em.