Friends of ours have a Cougar with a U-shaped dinette and an exterior door.
Doors are available from
Challenger DoorA drawer would be the easier way to improve access and probably cheaper way. You may be able to get a suitable door from the RV manufacturer via a dealer, that way the color will match. Walk around a dealer's lot and find a model with the right color and door size. Nape & Vogt makes an 8400RV series of drawer slides specifically for RVs. To open, you tug the handle and they stay closed without need for the usual cheapo roller catch in an RV.