i had a problem getting the right shocks when i needed to replace mine
(a job that started off as replacing the springs ended up in a 2 whole new struts including shocks, springs, bearings etc, just cos the bolts on the old shocks were seized in the engine bay. wasn't pleased, anyway, back to ur question...)
if i remember rightly, they changed the spacing from 52 to 54 around october 91 or 92 i believe, you can check with a renault stealer, give em a ring and ask parts what the spacing is for your car, he'll be able to find the date of manufacture from your reg.