Most people find that with the Oe one's. Buy a new mount, strengthen in using pipe and cable tie's.Bite the bullet and get 'em from Renault, the ones on Ebay are for standard Clios not sports.
Just got mine done and now my Scorpion exhaust is centered perfectly, the old ones were going but the car is 4.5 years old so OE is the way to go, otherwise you'll be replacing 'em every 6-12 months.
The correct sport one is a slightly beefier item. R77 00 424 339
£ 44 per pair but they do last.