ISO 4 stroke motor mount

I have mounted a box stock Predator on a CRG chassis but was using a loaned 15 degree motor mount that I believe is causing fuel starvation issues (predator tank is being used with gravity feed). My thinking is a flatter (either flat or no more than 8*) mount wold work. Does anyone have a decent used 4 stroke motor mount with butterflies that are looking to sell cheap?