As mentioned, Midway has them, but you will also need to buy the extractor, ejector, and springs
I had an ejector stuck and used kroil, a hairdryer and a small brass hammer to get free
Soaked the pin with kroil, heated the head up with dryer and tapped on side of head and it came out

Also sent one to Savage and they drilled the ejector out, don't know how they did it but that is what the return papers said they had done

Jack