I’m far from an expert on these sort of things, but from my experience from a caravan, finding a small (inch and a half?) stick on level isnt a deal breaker looks wise. It may originally have come from ebay. Else keep a small level in your galley if you feel the need.
My local hardware store keeps tire levels cheaply which you drive up onto to get the trailer level if need be. 
My preference is to use wind up lifts for the back of the camper frame to keep things level and feeling solid.
