http://www.hedgehogcentral.com/breederusa.shtml is the best I could dig up. I haven't heard of them previously to be able to say anything positive or negative... just that they exist. Kalandra might have a better handle on it than I do.
There used to be a girl, Lara, that was a USDA breeder in Southwestern Michigan. I believe she has stopped breeding. From Southeastern Michigan, the closest breeder is Millermeade Farms in Ohio (that I am aware of).