Headlight, and sometimes taillight, assemblies on our coaches are commonly from specific automobiles, such as Lincoln, and yours might be from a late 80s Ford pickup, Harry. A member here probably knows what yours is, but if not you may need to get a DOT number off the assembly, then search auto yards or online for a pair.
Some months back there were some on EBay. You might punch in "Beaver headlights" or something there and check.
Joel