The two places I know of that you can get a new bellows are http://www.custombellows.co.uk/ and from ecbuyonline2008 on the *bay... I've heard good things about both. I'm getting ready to get a new bellows for a Raja 8x10. Seems the going rate is about $200.
Thanks, that does seem like the best option. The old bellows is tacked to the frame and I'm trying to figure out how to best measure things. The old bellows has completely come apart.