I live in Jacksonville, Florida, and I'm thinking about making a trip to Dallas, Texas in March to participate in the 2012 ROAR Carpet Nationals F1 Class. I have a Tamiya F103RX that still has it's original foam tires on it. I know that ROAR is requiring rubber tires, so is there a way to put rubber tires over the existing foam tires? If so, what tire part number(s) and what web page do I need to order these tires from?