Q8TH2....38x15.50s will look sweet and im sure you know it but youll need a lift. As far as the tire cover goes, the only think i can think is to contact the manufacturer of the one that we currently have(
www.happeninghummer.com)to see if they will do a custom one for you. If it is important enough for you to have it, money usually talks--just about everything has a price.