I had the same issue, and needed more storage for pots n pans in my Micro Lite. I ran to the local home improvement store and found some 3/4 in shelving that matched the wood grain in the trailer. I also picked up some drawer raills. Had some 1/4 in underlayment from the garage, made some cuts on the tablesaw, and made the drawer. I also took the door off the hinges and adapted it to fit on the face of the drawer. Then I took a sheet to 1/2 in plywood got the spacing for the rails on the drawer. Made some risers out of 2x4's to mount to. Good project for a do-it-yourselfer.
2013 Flagstaff Micro Lite 19FD
2001 Chevrolet Silverado 1500 Ext. Cab 5.3L