Mike, if you don't get hep on this, you might try calling your county extension agent. Not sure who licenses them in Michigan but some health department (city, county, state) should have a list of who is licensed to do that. These will probably be the biggest ones, could miss smaller people that might work for you.
Can you post a notice at your feed store. Many of them have a bulletin board customers can use.
Also can you edit your thread title to add "mid-Michigan". That might attract more people that can hep you.
Thank you for the suggestions and advice. I'm finding that several of the processors I've used over the last 5 years have closed completely or stopped processing poultry. What's left are charging $5.00 per bird. I guess it's time to start processing on my own.