Hi Chad, Im in Lansing and have a few suggestions...
Of course the Shetland Sheepdog Club of Greater Detroit is a wonderful place to start, they have some links to some breeders and their phone numbers... Not every breeder in the club is tech savvy, so some websites are greatly outdated unfortunately.
If youre looking for sables- I would suggest Pat Gustofson (Agape Shelties), Veronica Dowling (HiDow Shelties), or Don & Linda Chilson (Lil' Blessings Shelties)... If youre looking for AOAC - Id suggest Priscilla Gardner (Breakaway Shelties), Diane Debolt (Wyndmyst Shelties), and Therese Walters (Walters Way Shelties).
These people are actively showing, winning, and produce good solid Shelties - temperament and structure.