Where to find historical hedge fund returns?

This is the beauty of a hedge fund they are not required to release this information. Heck sometimes you can't even pull your money out if the fund manager issues an injunction. The best thing I have ever come up with is to ask questions about their strategy (black swan, etc) and try to distill it out yourself based on statements. Unless you are a VERY experienced financial analyst it will be very hard, and you should brush up on your stochastic calculus.

Yes, here are some:

Bloomberg
HedgeIndex
BarclayHedge

Best of luck in your information hunt.