The problem with sourcing any used RV cabinets is the lack of quality. Plus, the chances of finding good used ones of the right type and quantity for your needs, are even more difficult.

If you could find a wood worker that can custom build you the boxes and face frames you need, they can then be fitted with doors from Ebay. It takes a well equipped shop to build raised panel doors, but many basic wood workers with minimal tools can fabricate plywood boxes fairly easily. The face frames are easily fabricated with biscuts, dowels, pocket joinery or many wood working joints.

The doors require expensive routers/shapers, bits, planers, joiners and tables. It is not worth spending thousands of dollars for tools, to fabricate a couple hundred dollar job.

Ask any store selling wood working tools about their patrons. The Internet lists woodworking clubs, try school wood shop teachers etc. Home contractors sometimes site build their own cabinets, and many are now out of work. There should be someone you could hire. I could do it, but you're too far away.

BOL  Gard

Here's a link to my interior.

http://www.wyndancer.com/horse_trailer.html

I built my own boxes and purchased doors for this ebay site.  http://stores.ebay.com/DOORSANDPULLS_Cabinet-Doors_W0QQcolZ2QQdirZQ2d1QQfsubZ3QQftidZ2QQtZkm

The cabinet depth was shorter that a normal kitchen cabinet because I did not want to use up my floor space.

One of the biggest problems with stock cabinets is that they come in 3" increments.  And in a standard depth. These measurements may not give you the best utilization of the space you have available.  for example let say your wall length is 26 3/4" long.  Cabinets in 3" stock size will come in 24" and 27" size.  27" is too big and 24 is 2 3/4" smaller that what would fit.   You can use the 24" and loose the extra space.  Or you can have a custom box built that is exactly 26 3/4" and not waste any space.  In trailers we are concerned about not wasting any space.

The same goes for the depth of cabinets.  A standard 24" deep base cabinet may take up too much floor space and a standard 12" wall cabinets my not give you enough storage, when you might want a 18" deep cabinets which is non-standard.

It's not a big deal for a woodworker to make the cabinets the exact size needed. But it is impossible for Home Depot to stock in inventory every possible size. Once you have a cabinet box built the exact size you need, use stock door sizes.

Really nice job. Looks very neat and professional. Good utilization of space. You should be very proud of your craftmanship.

Gard