Check out NAPA or a farm supply-type store for a set of tractor/utility lights. You should be able to pick up a pair of cheapy lights in one of those places for as much as shipping would be on the others.
I dont know that there in may way, but I do have a pair of black (5" or 6") abs lites. Real plain. No frills. Fluted glass and brackets with them. I'd say may be 10 bucks +s/h. I think I paid 22 (for 2) for them brand new. They were used one winter and I've since changed all the liting agian.