If it is a Fan-Tastic Fan, be sure to call them before ordering parts from somewhere. They have excellent customer service, and the cover domes have a lifetime warranty: on an older coach as yours, you're probably going to have to only pay shipping charges.
Adam and Sue, and a pack of little furballs
2007 Holiday Rambler Endeavor 40PDQ Limited Edition - Cummins ISL 400
2013 Ford F-150 FX4 toad - USGear Unified Tow Brake, Roadmaster Blackhawk II Tow bar, Blue Ox baseplate
Home base near Buffalo NY, often on the road to a dog show