The audi's sciroccos and the passats from the early 90's all have the same layout. I'm using a scirocco radiator then a passat fan with the double fan with one motor. It took some work to make it fit and used VW fan mounting tabs to work but all went together and fabbed up sheetmetal shields over the endtanks. The passat radiator is just a few inches longer than the scirocco.
Now what i was thinking other day for my water to air setup is that I'll just use a passat radiator in front of my scirocco. 3 times the size of the normal water to air exchanger, more volume and I'll be able to easily seal the two together, which will help on cooling because the fans kick major tail. Now as for fans the passat from the early 90's had no grill so the fan pulls certious rpms and volume but the motor is two stage and long. the corrados from the same time had the same style fan but the fan motor is super low profile. I've just never found one in a junkyard yet and most ebay sellers know what they have and want sell just the motor off the setup.
Just looked and no corrado factory assembly on ebay but found this which is a smoking deal and the same one I have. Top to bottom fits perfect on a scirocco but the sides are just a little long and requires just some small tabs with nuts and bolts. I used nissan taillight gooey weatherstrip stuff to seal the tops and bottoms and has never gave any problems. Only thing with this the fan motor is long and the turbo inlet tube has to be angled back towards the trans then up but I had a s362 with a 4 inch intake pipe and it fit so just about any combination of turbo will work. click me