Nissan March K10 SuperTurbo *Turbo leaking*

[komplikated]

hey bro's.... i have a nissan march k10 superturbo... recently my car has a problem wer everytime i boost it kinda semput... i brought my car to a foreman n he sed d turbo's leaking n spilling oil to d intercooler n d supercharger... n he oso put a price tag of 1400-1800 MYR just to srvc back the turbo.. my question is..

1) issit usually this expensive to service back a turbo (n issit safe to service d turbo??)
2) wat replacement turbo would be suitable for my engine *MA09 ERT* n also how much would it cost???
3) Which shop can i trust to do all these work n not worry about being overcharged??
4) Or issit possible for me to find another unit of d original turbo from the half cut if yes wer???

Please guys help me as im a newbie..

Thanks alot...