There are many available at the RV surplus places around the northern Indiana area. Bontrager's on US 12 east of White Pigeon, MI, has a good selection. West of town on 12 is Johnson's which also has several. Tom's Borderline Sales north of White Pigeon on 131N.
Does you unit have a convection oven? That is a regular electric oven with a fan. I thought I had to have a gas oven, too, but I'm glad I didn't insist on it. I love the convection. The only limitation I have found with it is that it would be hard to "dry" foods, but I don't do that anymore anymore and a small dehydrator would do the trick.
Dale