I recommend contacting Melissa at the Canton Historic District. She is very in tune with what's going on in your area.

Here is a link that might be useful: Canton

also look at Ann Arbor. Be very careful with contractors, the economy has been poor and even contractors that have been around for many years may have solvency problems, so pay for all of your own materials, and get "full unconditional waivers" after work is done and they are paid so you have a paper trail if they put a lien. look at the state of michigan web site.