Another good source for surface mount LED ones, are the local salvage yard. I didn't like the 3rd brake light that came with my cap, so I got one from a Suburban with barn doors. It's also the same kind as many vans. In my case, it's an authentic Chevy part number which I guess is kind of nice. No cop ever gave me guff about it, but if they did I can tell them it's a factory brake light. Also, factory parts are usually made nicer than aftermarket parts.