2003Titanium

Those of you that have replaced one of your Titanium Edition rims, where did you get it from and how much? I scratched up one of mine the other day and it's really bothering me. I'm thinking about getting a new one if I can find one for the right price. I've seen sets of 4 on ebay, but I'm just looking for 1 rim, with/without tire. Any help would be appreciated. Thanks.