After similar frustration with door lock cylinders, etc, I'd offer advice to try and ask a minimum of a dozen other locksmiths, even if you have to go to Library for yellow pages for nearby cities... Many locksmiths who are relatively new know how to work on US Auto locks and residential door locks.. Any other knowledge is a potential bonus... Bargman has been through some corporate restructuring since the 80's, and may have sold or acquired "lines" of locks and latches and safes....
There are replacement round floor safes (Like Amsec Star brand or others) but they use multiple lock pins, not a single pin... You may want to just try and hide one of your own, as other thread suggested, or use one of deceptive devices, like screw-off phony aerosol or soda cans... Deception is 90% of the battle, since a determined thief can remove about anything they identify as holding valuables... Our extra cash and keys in trailer are hidden so well I can't remember where they are, so I figure a thief will just grab the TV and run...
John McG
John McG