I still think Bentley EXP Speed 8. Use an Audi engine & transaxle, just like the original. I know the windshield would be difficult though...
But check this out...
Mulsanne's Corner: 2003 Bentley Speed 8 Mulsanne's Corner: Peter Elleray on the Bentley LMGTP
One of my favorite race cars of all times. It is absolutely beautiful!!