Shifter Problems: HELP!!!

I have a 02 Gt. Race at the track regularly. Have Hurst Billitt Plus short throw. I am told by speed shop I cracked the plastic guide that the shift handle snaps into. They also told me that I can't buy that piece seperate from the dealer. I think many people have "mangled" these plastic pieces and consequently have shifting issues. Does anyone know where I can get these parts or what I can do to remedy the problem.