Where I live they are all over Craigslist. All of the Tacoma guys pull the wheels and tires off when they do lift projects. Not that you need an entire set but I've seen them sold so cheaply that it might still be worth your while.
My 2003 T4r is missing the spare. I have 17" rims and am looking for a cheap wheel. Any idea where to get one online in the proper size (i think 17x8 with 6x5.5 pattern and 30mm offset)?