Howdy and welcome to Permies!
Are you looking for a good hatchery? Good quality
chickens? Good "Old Fashioned" Marans
chickens? Or a particular type of Marans?
There are a lot of mail order hatcheries that carry different Marans and they're all "good" for what they do, to whatever qualifications of good someone might have.
If you're looking for a good
local hatchery, Google can be your best friend. [
Here's a link to Ohio hatcheries.
You'd need to specify what kind of Marans to get a better
answer on the quality of the birds available (and most hatcheries that I checked are out of stock for the near future).
Looking forward to coversations!