Type 89 Quattro lightened flywheel ?

[Matt Evans]

Have an 88 90Q that I bought as the winter car.  Got the summer car running
and gave it a quick drive.  Summer car is a 24v straight 6 w/ 7000 rpm
rev limit, 6 throttles,  and lightened flywheel.  

Winter car has NG motor.

Does anybody make a lightweight flywheel for my vehicle ?  I got used to
heel/toe on the audi and driving the M5 was a real treat... instantaneous
rpm changes.  spinning the NG up to 5-6k for the 3->2 downshift is laborious
and distracting.