VXR 1.6t parts will all "fit" you would obviously not be able to use the 1.6 pistons etc. because you want a 1.8.

but the turbo, the manifold, down pipe, injectors, etc should all fit fine. Even the ECU should plug in with the tuning aspect of the turbo as a place to start. Plus this is an availability of used parts for a decent price on ebay.