The McLaren F1 LM is not exclusive enough for you? j/k
The FXX is close enough to an Enzo, we might just see Kyosho release one. The P4/5 would also be a cool Enzo variation to see as an autoscale. What I'd like to see are some of the not so recent supercars, like the Ferrari 288 GTO and the Jaguar XJ220.