OMP Subframes to bolt to the floor of you Clio, then the sliders bolted to these. You will then have to get some side-mounts that will bolt onto the sliders and then bolt onto the side of your seats, but that depends if you get side mounted seats or bottom mounted seats.
And as for the OMP Subframes the sides near you hand break will need packing out as they sit wonky otherwise, we'll they do on a 1*2.
Any ideas on which seats you would like?