It didn't. They were saloon only. There are one or two custom estates people made. The one I know of was a 2.0 Diamond estate originally, and it now has a 3000 GSi engine fitted, so not a true replica as it hasn't got the proper powertrain. There is another in the UK which I haven't seen, but I believe that underneath it is a 3.0 Auto. That one is blue.
But yes the proper Lotus Carltons are incredible machines, and incredibly valuable these days. I would absolutely love one. They were known to go 180MPH and do 0 - 60 in 5 seconds. The Police famously wanted them banned.
Lotus took the 3.0 I6 24V engine from the 3000GSi and bored it out to 3615CC, re-inforced the block, made custom forged crank, forged pistons, custom rods, some and added two T25 turbo's and water-to-air intercooling. The gearbox is from a Corvette ZR1 and the LSD is from a Commodore.
It has a place in my dream 5 car garage.