In my research I read that almost all RVs use the same cam locks for their compartments. I decided that I wanted my storage, electrical and potable water access all to be secure, so I measured my locks and ordered my replacements from Industrial lock & Hardware in Palmdale, California-
http://www.iss4locks.com/index.htmThey keyed all of my new locks the same so only one key would be needed. The old locks had 3 different keys. I also ordered spring loaded lock covers.
Electrical compartment before-

After -

Potable water access door before-

and after-

A close-up with the key inserted-

I decided to go with "Tubular" style locks

vs the disc tumbler

style as I was told that they are more secure.