Yeah, that's what stinks about seats in cars. Tough to get parts. Dealers can usually only order the entire seat, or frame, or pwr track. Will you be able to get it apart? I've never really looked at that track. (I work for a seat manufacturer, we didn't make that one) You're best bet is probably going to be to look for a good track assembly from a junk yard, or maybe make some new blocks. Unless a vendor on here knows a way to order just that part.
__________________ (SOLD May2013) 2002 SS #2545 SOM M6 1LE
, ARH LT's w/cats and DD, SLP lid with K&N, TUNED BY FROST, UMI SFC's & STB, STRANO SPRINGS.