Yeah, they're having difficulty getting rid of the Cup cars because they are not street legal. Strictly a track toy. And since they don't race in any series here in the US, HPDE track days are all they're good for.

Actually, the ultimate Lotus track car is the new 2-11. Again, not street legal here but amazingly enough it is in the UK. No roof, doors, windows.

http://www.elisetalk.com/forums/showthread.php?t=39211

Lotus also announced in March the Lotus Exige GT3, which does race in the GT3 class in Europe and does very well. It notches everything up on the car quite a bit.