http://www.fsgauges.com used to have what you're looking for until MS forced them to stop distributing MS copyrighted files.
I suggested to them they could still distribute non-MS files but I never received a reply.
Their gauge utility is pretty good, though. At least it will tell you which gauges are missing.
Maybe we could start a file exchange program - non-MS files, of course. Maybe if you post what you're missing someone can send them to you.