Looking for a master key for my Holiday Rambler

Yep...got all those keys too. Only solution is to replace all the locks. I posted the same frustration a while back and the only answers I got was that most MH manufacturers have several different parts suppliers to build one MH and as such they buy access doors from different suppliers with different locks. The interesting/scary thing is that I'll be willing to bet that my keys would fit and work in some of your locks.....