http://www.ferrarichat.com/forum/348-355-sponsored-bradan/288373-fear-not-seat-pot-potentiometer-how-rebuild-one-without-removing.html http://www.ferrarichat.com/forum/348-355-sponsored-bradan/360181-seat-potentiometer.html http://www.ferrarichat.com/forum/technical-q-sponsored-algar-ferrari/207662-f355-spider-seat-potentiometer-wiring.html http://www.ferrarichat.com/forum/technical-q-sponsored-algar-ferrari/21107-f355-spider-seat-problem.html http://www.ferrarichat.com/forum/348-355-sponsored-bradan/131465-re-post-f355-spider-potentiometer-photos.html http://www.ferrarichat.com/forum/348-355-sponsored-bradan/400023-another-seat-potentiometer-thread.html 64978300 POTENTIOMETER - Ricambi America, Inc.
I have not verified but was told a few years back by the parts manager of the then Ferrari dealer in the north Los Angeles area that certain model Jags used the same part as Ferrari and could be picked up for about $150.