Got a picture?
I have access to a large database, and maybe can match up the headlight using a visual search engine. If you can get one, post a fairly close up picture of it, maybe we can figure out what else it fits. Several class A motor homes use headlight/turn signal assemblies from Ford pickups. Here's an example, this clip from a motor home shows a headlight/turn signal assembly from a 1987-1991 F150-F450 super duty truck:
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.