There was a Double Gun Journal article on a guys Nitro Special that had a brass shim on the pin, that lasted for about a decade of duck hunting, with the big number rounds, which was then sold to another guy, who was aware of the repair, and used it for many years, for the same type of use, with the same repair. He had paid $10 or $20 bucks for the old gun, and tried the repair, and found it worked just fine for his use.
A sheet of ordinary paper mics at around .004, and usually stays in place just fine, if you don't need to tear the gun apart to clean it. I like the notion that the paper will hold some oil while doing it's job, but, anything that takes up the slack will likely be OK.
Sorry to hear about the limitations on options for repair. Well, a money repair, at any rate. The free one will work just fine as long as you want it to.
Best,
Ted
