It is not discontinued, that is their phrase for "we no longer stock the part or support the car". The part is still manufactured.

I think it was George (ala_xfire) who found that switch at MCM or Digi-key electronics. It is a common normally-open small switch and sells in lots of 100 for around $1.50 each. In quantities of one, expect to pay around $14 with shipping.

THe next day it rains all day Saturday I will dig up a source for it - if George does not chime in here.