I'm going through exactly the same thing. 2006 FR TDI with ASZ engine and turbo gone.
Have bought a turbo from a MK4 golf ASZ. The manifold egr outlet is slightly different/ offset from the one removed. However given that the pipe which fits it is flexible, it shouldn't be too much hassle to fit. Failing that, it will be EGR delete as suggested.
Am surprised that you managed to get it off yourself, perhaps should have attempted it myself but am keen to get all the pipe work cleared out in case of anything having broken and lodged itself in the pipes.
Also as suggested, 150 turbo will fit but you will need to have the car remapped to suit.
The turbo from sharan will need to be clocked, I.e. turned so it's positioned correctly for the pipes. Very easy, just 6 or 7 bolts, undo them and remove the turbo, reposition it and tighten up the bolts again.