I don't know how many people remember or have used the Traintek "drop in" boards made for various USAT diesels.
They give you an "Aristo" socket in your USAT diesel.
They aren't cheap, but apparently an option was to purchase a set of "custom" LED replacement boards that would replace the incandescent bulbs for the number boards, headlight, etc.
I have NEVER seen these "LED boards" and there are no pictures on their site. Has ANYONE a picture or can share anything about these boards? I noticed they dropped the prices on the by $5 (!!) and the links to the user installation manuals are all bad (at least the 3 I tried).