Terry, the topic comes up quite often on the forum. Some owners have done this, but you have to be careful to choose a connection oven that vents out the front of the cabinet and not the rear. Convection oven vents get HOT, and the enclosed space on the sides, top and back would definitely pose a safety or fire issue with many convection oven models.
This site offers several different models of convection microwaves that vent out the front, but you'll want to double check regarding size. The microwave cabinet in Escapes is pretty small.
www.rvupgradestore.com/RV-Microwave-s/310.htm