Gun shop, gun show, pawn shop, on line auctions.
best left to a gunsmith.
Find a good gunsmith or machinist
You need a gunsmith.
Take out the screws?
You can find a firing pin for the ranger at Numerick Gun Parts Corporation.
Try e-gunparts.com
Rings, extractor/ejector, firing pin. forearm
You need to get assistance from a qualified gunsmith.
Gunpartscorp.com
Try e-gunparts.com
From Henry
http://e-gunparts.com/