Thank you! I haven't seen upfitsupply's offerings before. (I like the idea of prefab panels a lot.)DuraTherm Insulated Ceiling Liner Kit for RAM ProMaster Cargo Vans () from Upfit Supply. Get The Best Deal and The Best Support From The Work Van and Truck Specialists.upfitsupply.com
They make liners for sides & doors; too or a complete kit but I’m only interested in the ceiling.