EH? Quick search on google gives me:
http://www.rh2way.com/catalog.php?item=292
Which looks like the legend kit, but statesid sourcing. Bulk discount on the drivers receivers (and they give you the control radio free. Job done surely, even including shipping tax?
I quite like the idea of this in principle, but surely I'd be cheaper if the safety car was allowed to use this (
http://en.wikipedia.org/wiki/PIT_maneuver) for car's that refused to stop for a black flag instead? plus it'd add some entertainment for the spectators