@Storm
It might not be wishful thinking for too long though, ABT, MTM or Oettinger may be building something like that. You would know about the MTM Bimoto...
On a different note, if I'm not mistaken, it was ABT who originally shoehorned the A8 4.2 V8 in the B5 A4. They elongated the bonnet to receive the 350 BHP V8. That prompted Audi to develop their own V8 S4 (the B6).