You don't need any special heels for the Burton Race Step-in Bindings.
Check out Derf's website for a close-up picture.
http://derf.dyndns.org/~derf/gallery/snowboard_Burton_1997/Race_plates?full=1
$50 plus shipping
($125 plus shipping for the bindings and the board that it is mounted on, picture included)
Let me know if you have any questions.
Thanks!
Goro