TPS is around £30 iirc
Best way of doing it is by removing the airbox followed by the Puck valve then you should have enough room/movement in the intake pipe to remove the N75 valve, whrn i swapped mine out i pulled the pipes off the turbo/wastegate then swapped them to the new one of the car, make a note which pipe goes where before you remove it.
Part number :- 058906283F