VisOneRV in southern KY has used cummins engines here is a link to a ISL 400 RV Chassis Parts USED CUMMINS ENGINES FOR SALE | CUMMINS DIESEL ENGINE | 2002 8.8L ISL 400 FOR SALE - 94,000 MILES Cummins Diesel Motors | USED CUMMINS ENGINES FOR SALE | CUMMINS DIESEL ENGINE | 2002 8.8L ISL 400 FOR SALE - 94,000 MILES (visonerv.com)