Have a Golf 4Motion (2.0 tdi)

Turbo is whining so with 142k on the clock, think its time to replace the turbo

Ive had a few instances of going into limp mode under hard acceleration so over boost

My question is, I'm not really interested in fitting a brand new turbo, but what are my best options

An excellent recon unit with 12 or 24 month warranty seems a good option, but where is the best place to buy and have it fitted?