It's a torsion bar (there's a guide for ClioSport members in the Articles section).
Getting it the same is semi-guess and just testing I guess - I think I remember the guide using a ruler etc.. so that helps loads.
As for dampers, well.. I had Williams rear shocks on my 1.2.. which made some sort of difference. I had standard shocks on the front.. so didn't look into any aftermarket shocks for the car. (Well, I did.. but they were coilovers from Gaz.. )