Reputable turbo rebuilder.

[510six]

First off I am looking for a reputable turbo rebuilder for a Precision T67 ball bearing turbo.The turbo has less than 3000 street miles on it and has always has a clean and sufficent oil supply.This turbo has started to smake after less than 2000 street miles and has already been sent back to Precision for a "rebuild" after re installing the turbo on my car (a real PITA) it smoked again.Before the turbo was sent back to Precision it was ran on a staionary engine with a water brake to confirm that the turbo was at fault and not a faulty valve seal or other mechanical failure in the engine.I do not want to send the turbo back to Precision only to have the car down for a long period of time only to have a street/strip turbo smoke yet again.