I have a friend who makes a bimini-like top for FFRs with dual roll bars. I don't know if he is registered on Club Cobra, but he can be found on FFCars and Factory Five Forum as a vendor and participant. He is in Henderson, NV (Las Vegas area), but makes them and ships anywhere. It attaches and detaches very quickly, and can be stored easily in your cobra's truck for use whenver it rains or the sun is just too much.
Doug's Roadster Tops for Your Factory Five Roadster