James Wiles possibly? I have not submitted to him but maybe someone here knows more? I'm not sure about Ken Potter but a possibility?
@korey d Here is a direct link to Dr. Wiles "Variety Vista" site and attributions. He charges $10..00 and up depending upon the series of coin, which is double that of John Wexler. So you may want to have someone local at a coin show or shop who does this kind of thing first before spending the money. If it is a new variety, then ANACS would be your best bet to have slabbed but they will charge you an additional $9.00 plus a fee per coin, plus shipping back. As you can see, this would start to get pricey after awhile. Personally, I would hold back on these expenses, especially if it turns out to not be what you hoped it would. Hang onto it for awhile and explore your options.http://varietyvista.com/Attribution Services.htm