Usually just lurk here but I love prime rib and have had good luck preparing it at home.
Grundhofer's Old Fashion Meats--Hugo MN (651)426-2800. Call them to see if they have any aged standing rib roasts available for Thanksgiving. Used them for New Years Day dinner and it was outstanding.
Or try Stasny's Food Market--St Paul, MN (651)489-2171.