Hi sotired,
The Cincinnati list is in post #212 here and the Indianapolis list is in post #2 here. Original Mattress Factory is one of the latex options available and carry a two sided latex hybrid mattress. There is also a list for the Louisville area in post #3 here.
The tutorial post here also has a link to a list of the members of the site that sell latex mattresses online that include many different latex options, designs, and budget ranges if you decide to go in an online direction although you do have some options available locally as well.
Phoenix