Tunnel flying, body flying, indoor skydiving - whatever you want to call it .. meet like minded people and get the latest advice, news and training tips here!
www.tunnelflyer.comAlso try www.bodyflight.net for more tunnel flying resources
Seriously though.. if you are looking for an alternative to the franchised tunnels... the L1 VWT marketed by Bodyflight Concepts at http://www.bodyflightconcepts.com may be up your alley. By providing blue prints and building assistance, you build your own tunnel on site, and never pay royalties
If you INSIST on trying to build one on your own, please get in touch with my husband first through http://www.bodyflightconcepts.com.. he'll save you hundreds of thousands of wasted dollars not to mention loads of time. There is no charge for his consultations via email.
Also.. there are at least 2 companies out there who will take your money for blueprints online.. please be VERY VERY careful who you give your money to. I always advise trying to make contact with the company first via email or their contact links and ask for references for sure and don't give anyone money until you hear back from them.