Do not get a re-conditioned from this company as they are putting out turbo's that are'nt set up right. I have found this out as fitted one 3 months ago which has packed in already, the variable vain is not set up correctly according to 2 different mechanics & there 2 year warranty isnt worth a damn as they blame your engine and say it's not there problem. A word of advice.
For a Turbo to last 3 months, suggests that their was no previous problem directly after fitting the new unit... boosting problems would put the vehicle into limp mode, assuming that everything else was perfect!
What caused the turbo to fail in the first place... poor servicing history?
OP states that 2 different Mechanics expressed an opinion that the Turbo unit was at fault... how the hell could they know without stripping the car/turbo to come to this conclusion! with that diagnosis, neither of these would I let anywhere near my car!
Failure to deal with any of the pre fitting requirements prior to fitting of the new unit, would ultimately lead to the turbo's early demise
OP, ask the garage that fitted the "Faulty" unit if they carried out ALL of the required checks in the link below... my money is on they just swapped out the old unit, and in with the new!
http://www.midlandturbo.com/fitting_guide/Thom