This sort of thread should definitely be stickied. Literally half the forum has done this, there's stuff everywhere. Infact there are probably as many posts about reps as there are genuines (which makes me sad as reps downgrade the image of genuine ones IMO) Still reps are popular for the simple reason RS clios look good standard.
Visit the search page:
http://www.cliosport.net/forum/search.php
Type in "sport rep" or something like so:
http://www.cliosport.net/forum/search.php?searchid=4657315
Click on first link, probably:
http://www.cliosport.net/forum/show...-Blue-Sport-Rep-Project..&highlight=sport+rep
It's not the most expensive project & parts are readily available but you're still talking the best part of £200 for the interior, £30 for RS grill, £300 (total guesstimate?) on bumpers, skirts, arches, £50 (?) spoiler, £11 skoda splitter, £100 for the RS steering wheel, £200 for wheels & tyres. Your car will now look like a Renaultsport Clio to pretty much everyone who hasn't owned one. If you want to go the whole hog add £100 (guesstimate) for Xenons, £200 for rear beam & rear disc conversion, £50 (?) for hubcentric spacers to widen the front track, £100 for some Eibach sportlines/prolines to make it roughly the correct height and finally Ktec Racing (AKA KTR) do a "182 look" exhaust for about £300 that you may be able to adapt to fit a 1.2 engine.
£1000s basically. It'll look good but it'll still be slow as f*** and your insurance will go up hundreds if not thousands. If bell/admiral/elephant charged me £100 to insure the optional extra "cup pack" (upgraded suspension/wheels/spoiler/splitter) then I dread to think what they'd charge to insure what would no doubt qualify as a "body kit" in their eyes.
Something else to consider, the 182 came in "black gold" which is NOT the same as the 172 "black" or your "black." You will therefore have to source all your parts from a black 172 (unless you want it to look like the top half of your car is constantly dirty whilst the bottom half is brighter...)
Something far too many people on here overlook is how good a clio can look with a few simple bits and pieces,a clio can look good without being a sport replica. A can of spray paint for £15 to colour code the bump strips, a £30 RS grill and £200 on 172 wheels still looks great!