Go to this website:
LED lightsIf you search their website you can probably find replacement LED lights for your application. Get the LED lights with the TWO wires. I went with the exact same size but they were sealed, meaning that even if water got under the lens, there was no way that it could leak inside or that any water would affect the electrical components. Once you find the replacement lights, you can either set them in to a bed of sealant/adhesive or caulk and screw them in place.
I have had mine now for 5 years and they are still brighter than my old incandescent clearance lights and there is no leaks.