Talk to Mark Hartshorne at Pinnacle High performance Guns, he rechambers .38spl and .357mag guns to .38 Super. So does TK Customs. However, if you're interested in something like the S&W PC gun you pictured I think you'd be better off finding one, new or used, rather than having something built. You can also call Hamilton Bowen, he can probably make you a .38 Super using a blank cylinder, just be prepared to pay.
If you're going to be dumb you'd better be tough. Stupid hurts.