Here's one at what seems to be a decent price.
PrehKeyTec MCI 96 (Keys) POS Programmable keyboard with magnetic stripe readhttp://www.ebay.com/itm/321335405772?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l26
What I've heard is that they are rubber domes (but they claim 30million keypresses). I'm mainly interested in finding something:
1) easy to program for 64bit windows7
OR
2) can be adapted to teensy
3) Cherry MX switches or at least a non-yucky non-wet newspaper feel.