I think the side skirts are the same as the 172 has had for yrs.
If so its
http://erc.qmuc.ac.uk/cliosport/gallery/full/1084738650__err.jpg
60 00 073 577 PANEL £81.97 ex vat for part 2 on the drawing
60 00 073 578 SIDE SKIRT £81.97 ex vat for part 1 on the drawing
77 03 072 209 RVT TN1788B/1837B £0.63 ex vat for part 6 on the drawing
77 03 016 340 SCREW RE T/NOTE69 £0.38 ex vat for part 3 on the drawing
77 03 072 047 RIVET £0.48 ex vat for part 5 on the drawing
77 01 206 434 KIT ADJUSTERS £5.92 ex vat for part 4 on the drawing (not sure how many in a pack though)
If you want the Renault PDF saying how to attach them Ill sent it you just tell me your email address. Its very easy to attach them the bracksts screw into the bodywork so you do have to make holes in the car. You could try and bond them on if you didnt want any holes in the car though.