As said above, it's a Vento front end.
All you need is the grill, headlights, and the bonnet. Don't let people fool you by telling you that you need to change the slam panel and bumper because it's simply bullsh!t.
The grill you're after is an early spec grill. There were three types, early (2 bars either side of VW badge), middle (1 large bar either side of the VW badge), and late (looks more like a Polo!). The early one is by far the best looking one and is getting harder to come by now so therefore worth a lot of dollar! I've seen the grill alone sell for as much as £120, I sold mine for £75 I think (Thanks anyway Deano!), but if it helps, they were only on the 1993/1994 cars.
Unfortunately a Corrado front end wouldn't fit as it's a completely different design/setup altogether