Reading the Lotus West article in 54MC066_1973LotusClinicAnnual_Europa.pdf, they have a note that might interest some of you.
"Factory approved air conditioner for the Europa Twin-Cam. It uses a rotary compressor which drives off the water pump pully, not the camshaft.
Coolaire MFG Corp.
10400 S.W. 187th Street
Miami, Florida"
Probably way out of date, but someone might find it interesting.