FAL Inch sandcut bolt/carrier sets, $20 shipped, 5 @ $17 each, 10 @ $15 each. Most are like new, some are more like VG. Well worn finish at $12 each plus $4 shipping for any number up to 6. These also work just fine in metric rifles.
FAL Excellent/like new Inch pattern receiver covers, $10 + $4 shipping, regardless of number. 3 or more, $9 each
FAL Inch pattern buttstocks, both wood and plastic with buttplate/pad. $10 shipped
FAL Inch pattern wood sets w/pistol grip, handguards and buttstock, $15 shipped. No hardware included except buttplate. They'll need a refinish to be anything other than servicable.
CETME furniture sets. New, no buttpad. $25 shipped.
15 rd. USGI M1 carbine mags, well used, may have dents or surface rust/corrosion/pitting, or both. Fully functional, fully fugly. $3 each, free shipping on 10 or more.
AK 74 Orange bakelite mags, 5.45x39, like new, unwrapped. $8 each + shipping, or 10/$73 shipped. Only have 10 for the time being.
AK 47 follower floorplate sets, made by FSE, in 7.62x39. These count as two US parts toward meeting your compliance numbers. Floorplate is stamped, and marked FSE USA. Follower is a composite material(delrin perhaps?), and unmarked. The followers are made in the pattern of the waffle mag followers, although the floorplates will not fit waffle mags. The differences between these and OEM steel followers are significant enough that even ATF will recognize them. $1.50 plus $6 priority mail shipping on 10 or more sets. Fewer than 10 sets will have shipping figured individually.