From Henry
You can find a firing pin for the ranger at Numerick Gun Parts Corporation.
You can find a replacement firing pin for a Stevens model 87D 22 cal rifle at a gun dealership. You can also find it by contacting the manufacturer.
If you look at the bolt face, a center fire rifle will have the firing pin located in the center of the bolt. A rimfire rifle will have the firing pin located on the outside edge of the bolt.
Try e-gunparts.com
Find a good gunsmith or machinist
e-gunparts.com
To remove the firing pin from a Winchester Model 100, first ensure the firearm is unloaded and safe to handle. Disassemble the rifle by removing the stock and bolt assembly. Once the bolt is accessible, locate the firing pin retaining pin or screw, remove it, and gently slide out the firing pin from the bolt assembly. Reassemble the rifle by reversing the disassembly steps.
You can find a firing pin for a J.Stevens "Crack Shot" Model 26 by contacting Cardinal Promotions Inc. at email address: CardinalPromotions@mchsi.com
Ask a gunsmith for help
Any rifle that the firing pin strikes the bullet casing right in the center of the casing, causing it to discharge is called a "Center Fire Rifle." In contrast a "Rim Fire Rifle" the firing pin strikes the edge or rim of the bullet casing causing it to discharge.
google it.
http://www.wisnersinc.com/ They will have what you need!