If you live around Raleigh, NC, you're going to get some unique opportunities to get your hands on a Y. Fish custom soon. I've taken up geocaching, and guess what I like to leave in caches sometimes?
I've already planted two ponies, and there will be more to come. I mention in my geocache logs if I've left a pony in a cache, and I link to the cache page in the dA description of any pony destined for the field.
(Also, commissions are open for more traditional money-for-pony exchanges!)