For a Henry J? Rudy Phillips remanufactures them. They look and work great. If you're a Henry J owner, you need Rudy's catalog. I have an electronic copy. If you want a copy, send me a private message and I'll e-mail it you.
Otherwise, his contact information is:
Rudy Phillips
2136 Walnut St.
Ramona, CA 92065
1-760-789-3608