To do a turbo swap right, you'll want a whole donor car.
The easiest route, is to go find an XR2 to drive.
The turbo swap is not as much a swap as it is a conversion, you can swap in just motor/harness but then your stuck with a ticking timebomb of a transmission. (turbo has beefier trans, larger better clutch)
If you'd like I can go into detail about the conversion.
I'm not sure where you could find a motor, there seem to be a handful floating around