John90XJ

You should be see a molded code number in the light housing that begins with TYC followed by a number. A quick Google search will lead you to the OEM piece and then what you need. My experience suggests you should avoid places like eBay and instead try RockAuto.com for replacements. My Fleetwood uses lights from a mid-90s GM pickup truck and I replaced the headlights and the turn signals housings on Rock Auto, all four components, for less than one headlight on eBay.