bike frame

Where can I get a good bike frame? Preferably one with a gas tank built in and not off of a sketchy website?

Hey guys (and possibly gals), I know many of us want to make full suspension builds, and may not have the time or resourced or will to make a custom frame that can mount an HT engine, so I thought it would be a good idea to list all full-suspension frames compatible with the in-frame mounted...