I got it at NOC. Go here and scroll to near the bottom:
It looks like the price went up to $145 over the last few years, but I think that this is still the cheapest 4-piece out there. The Lendal one sold for something like $249, IIRC.
Jeremy and Tony are good guys there and will treat you well. If you tell Tony that Steve in Denver sent you, you're liable to hear about some swim I took.