Re: What happened to the R.I.M.S. mount company?
Gary Gauger still makes R.I.M.S. mounts, although with a slightly different design. There are also knock-offs that are suitably close, and with different names (Ludwig's is Vibra-Band.)
But the memory locks are probably not part of the R.I.M.S. system, they sound like they're part of the tom mount clamp, or something related.