Idaho.......Yup....I do make a removable license plate bracket for Speedsters. They are available from Sierra Madre Collection and Vintage Motorcars. Currently I'm developing something for a Spyder front plate. Also a cup holder that has a very masculine look and fits up to that wide door post area adjacent to the door sill.
I developed my own version of a "Transformer" looking/working cup holder as well, but the cost to manufacture it was cost prohibitive..............Bruce