If you are interested in a totally cool third brake light, check out the Grimes model B aircraft wing light on Univair Aircraft Supply's website. I dug around my old parts box and came up with one, red lens. I will be installing it on a machined aluminum (or aluminium, depending of your location) mount, and using an LED bulb in place of the incandescent one.
I believe it fits the Morgan quite rightly.
Best,
tom
