OK, here are some more:
A jeweled Rainbo-Cap for your dash light:
....a cooler for your generator:
...turn signals (with switch) for the back of your car:
...some Moto-Lite Motometer lights
...a Monogram Locking Radiator cap:
...an Upstarter so that all you need to do is retard the spark and the starter engages:
Brad in Maryland