Hi Mate - R-Sport sell them however I discussed with them previously and they said that the boot lid will need removed and cut to fit it. I was looking at speccing a new 200T and getting this fitted but it turned me off the idea
As Fernandez said, R-sport are the official suppliers for all Clio cup race car parts. And the rear wing that you speak of in a race car part, so Renault themselfs do not issue these. Only R-sport will sell you one at the moment!
I believe the wing is one piece, think the upper and lower is a modified boot spoiler to accommodate the rear wing as said earlier, if you buy the wing they have to take your spoiler off to cut it so the wing fits!! maybe this is a pre cut spoiler!