Check out E-bay and the swap meets. You may get lucky and find an original dealer backup light kit. These included all the parts to install them, the lamps. switch, and harness. They should inculd both the column and floor shift parts for the switch. I found one for the '55, still in the original box. It wasn't cheap, $250, but I think that it was worth the cost to have lighting when i back up. The only change i made was putting halogen bulbs in for more brightness.
