I think you might be better off having a new counter top cut. All of the big box home improvement stores can order custom cut Corian or other solid-surface counter tops. It shouldn't be horribly expensive since you're not doing a sticks and bricks remodel. If you have a rig that can carry the weight, check out odds and ends at a stone countertop dealer. They often have pieces of granite, quartz, marble or other stone left over that should work in a limited surface area application.
You could do a tile glass or ceramic backsplash. I've also seen punched copper backsplashes that were pretty. Small quantities can be pretty cheap. We've also had good luck finding things at Habitat stores and the like.
Elizabeth RVM55 and Mary
2014 Thor Ace 30.1
2014 Chevy Equinox V6 LTZ AWD