Hi there my friend, i was too interested on doing this, so here are your options:
1) OEM VW Corrado item (original), costs 120 uk pounds (search at vagparts.com and go to 'VW' 'Corrado' 'interior parts')
2) Neuspeed dual gauge panel - Neuspeed used to do this kit but no longer available (msybe search for this in e-bay)
3) VELOCITY (plastic panel for 2 centre gauges) $25
4) DDI Corrado oil/Volt gauge face 25E
5) Custom-made yourself a plastic closer and put 2 (or three) gauges. I saw many Database members do that!
6) And finally the best solution for me: There is a company in UK called 'Audiosport' who makes this, costs 30pounds and looks AWESOME!!! The best
silver vredestein
Tornado
Cheers my friend 