Jerry at Deadbolt is the man, get a new compressor blade thrown in there too. He'll also do ceramic coating and turbine blade clipping. www.deadboltspeed.com is his website I believe.
I know his rates for the monster stock turbos were reasonable for the work done, not sure about the pricing on the VF39
what ever you do, do not stick your air intake into a bag of sand to port and polish. http://www.audiforums.com/m_693578/tm.htm
Just get a dremel and DIY, takes 10 min (once removed from the car). Lots of documentation on NASIOC that tell you how to do it.
Sure, but the people claiming they have one without a crack don't know what they are supposed to be looking for.