Check out www.hfboards.com. I went there asking about getting Avs autographs at Prudential Center and Nassau Colisseum last season. They are very helpful. I haven't been there in a while, but if I remember correctly each team has it's own sub forum. I posted in the forum of the home team (even though I wanted the visitors autos)
PC's
Patrick Roy PC 966/7,265 = 13.30% Complete
Brandon Yip PC 101/183 = 55.19% Complete
Nick Palmieri 93/150 = 62.00% Complete
Unique Avs Cards = 1303
Unique Nordiques Cards = 1054