Cooking facilities were a core requirement of building a motorhome, but what to have. We had seen many nice units when we visited the camping and caravan show but when we came to look at buying one, found odd bits not to our liking. We wanted something practical, again along the lines of our caravanning days, so opted to go for both a hob and an oven. But trying to find just the two, and with electric ignition (we were giving up on matches and burnt hair!), proved fruitless. The next option was Hob, Grill and Oven and while this was much bigger, did everything and we found that we used it. Also fitted the kitchen unit perfectly and came with a fitted door at the bottom for under unit storage. We never considered anything other than gas, though sometimes one of us hankers after a microwave!
Lots of places sell this type of thing, but we got ours from a chandlers, equipment for boats being mostly suitable for motorhomes!