Not too sure here without looking.
I know if your sticking just a normal scirocco engine in you use the golf GTI mounts from a MK1 but you say this engine is supercharged, Is this the G-lader supercharger fitted to Rallyes and G60 Corrados or some aftermarket special, (Rootes etc?) And is the donor scirroco a Mk1 or Mk2?
If its a Mk1, use the Scirrocco's if not, you may have to bodge your own.