Restoring small door coin mech

I am looking for a company that restores the coin mechanisms from the 50's style machine.  I know I bought a restored coin mech from them in the past but have lost all information, if anyone knows who either restores coin mechs or sells repro small coin door mechs for a Vendo 81b let me know.

Also what is the best way to clean a the coin acceptor part of the mech.  I have heard about the hot water and soap with a toothbrush method but don't know if that is just for the newer plastic coinco models or the older metal models.

Thanks

Well turns out the coin mech on the machine I bought is fine afterall, someone had set it to freeplay so the guy bought it from just figured it didn't work a nice bonus.