Leather Recaro's are heated, cloth aren't as far as im aware, iv been in 3 full leather r32s with recaro's all heated, mine used to be full leather but had the centres trimmed so all the heating elements etc are still there, and the full leather set I had previous to these were heated.
Doubt you will be able to buy a part to heat the cloth ones as as far as i know the elements are all retrofitted into the seats, so yours will have no heating elements built into them.
So as far as im aware cloth arent and leather are