Get us some more pics. Whole rifle if possible. I love saving these but, they are rarely worth the investment. Here is a rough list. Hope it helps.
Bolt:
-Firing pin
-Cocking piece
-Safety
-Shroud w/lock plunger
-Mainspring
Bottom Metal:
-Trigger guard
-Floorplate
-Follower
-Magazine springs
-Front and Rear screws
-Lock screws
Sights
-Rear sight leaf
-Rear sight slider
-Rear sight spring
-There is a screw missing in the base
Receiver
-Ejector box
-Ejector box screw
Numrich is closed in NY for covid but, you should be able to pull up a schematic there and cross reference part numbers.
*If you can get a stamped Winter trigger guard, these came with integral mag floorplates like an '03A3. Might have even been OEM on that rifle since it had the turned down bolt and laminated stock
**Don't forget cleaning rod(Measure first to get the right length for the stock variant you have), front sight hood, stripper clips, and sling while you are kitting it out.