Jamie,
There is one for auction on eBay HERE. I don't know how much you are willing to spend, but here is another that is BIN but is a bit high: HERE. Good luck on your search. I looked for about two months and stumbled onto a mint copy for a very reasonable price on eBay from Japan. Check the big auction site several times a day and you'll eventually be lucky enough to stumble onto a nice copy at a good price. Hang in there; It's a lens that is well worth the wait and it almost literally never comes off of my P67.
Pentax 67 75 mm F2.8 lens