If there was every a broad question, you certainly asked it!
You can start by contacting your Local Historical Society, or your Local Preservation Society, for information. Once you've exhaused those options, how 'bout visiting BuildingMovers.com. I did a quick WEB search and got this site as a 'hit'. I can't vouch for it in any way but I did see some posts on their Forum about what you want to do
Good luck, I guess! My best to ya and hope this helps.