I don't know how soon you need them, but there is going to be a NOAH (Northern Ohio Herpetology Association) showcase on May 11, at the Cuyahoga County Fairgrounds. There are usually 2 vendors selling frozen mice and rats and every once in a while there is someone there selling live rabbits.
The website is www.noahonline.net
Currently the site's been down b/c they are changing the whole site, but keep checking it. It should be great once it's up and running.
Or you can send me an email and I'll give you more details. I'm a board member of NOAH.