There is a comment that I picked up on in another thread that says that we have great choice in the sub 1 cc diesel class that are in production and was wondering how extensive that list might be?

Ones that I know of, and there are most certainly going to be others are -

MP Jet 2 models?)
Red Fin (3 models?)
PAW (3 models?)
PB 030 (still in production?)
Cox 049
PAL Lola 0.3
CS (3 models?)
Norvel?

Please feel free to correct the above and/or add to the list.

Cheers.