Any local real estate professional with access to the MLS can provide you with homes offering Land Contract as terms. These two areas are in different MLS areas, so you need an agent with access to both.
If you cannot find one yourself, I can provide your contact information to a few local agents, you can choose one. In Michigan, a real estate professional can work for your benefit only under a Buyer's Agency Agreement. This can be for one home, a day, week, whatever time period is agreed upon in advance. There can be extensions. Let me know through my profile.