The teams that don't go through MeiGray tend to be pretty expensive because they market directly to their fans, and in-house fans are almost always willing to pay more. The Wild knows they'll get top dollar in their own shop for unis, so you'll either have to find one on the secondary market, wait for a team sale or try to develop a relationship with the team's store manager.
For other teams, MeiGray sales are an excellent option (if you can make it out their Expo onsite in the summer, even better), or check out gameworn.net for guys who are selling out of personal collections.
If I can be of any specific help, just drop me a line!