Speedbicycles is selling a pair of first generation delta calipers on ebay. Appears to be in good condition although the pads aren't original (but you weren't actually planning to use them to stop a bike were you?)
Actually, they could well be a great match for a road-going fixed-gear bike with 1st generation C-record track cranks and sheriff-star track hubs. Ya know. Just saying.
ADDIT: sold USD $1924.99 (27/5/11)