The part numbers of the Abarth body parts are stamped on them with FIAT along with the makers name Zender GMBH, the rear spoiler is really easy to see just by looking underneath it, the skirts not so sure, but there is a set in classifieds that if you ask nicely the person may be able to look for you.
Front and rear aprons may not be visible unless the bumper are removed but always worth while asking someone with them to see if they can see.
front apron number is on the drivers side directly infront of the wheel, cant look right now as cars off road at home.. and i think rear apron is on the pass side directly behind the wheel.. will also look for you when i get in..
Craig
Part number of rear bumper is 5908535 and for sideskirts 5908530, I would try to do search through EPER 59085xx parts. Probably you will not get pictures, but names at least.