offset of the standard 7.5X17 wheel is ET68, i think. not sure.
(i've got 8X18 wheels, like on the clio raider and they're ET66.)
i have a second set for trackdays. braid fullrace R ...
http://www.braid.es/wheels/products/competition-wheels_p8/fullrace-wheels_p81/fullrace-r_p424.html
they're only one size (7X17), but you can specify the ET value between 45 and 65. so if you want them to have the same offset as the standard rims, you should go for ET62. thing is, they are not the lightest wheels. (and also not to everyone's taste ...)
other braid wheels won't go as high on offset. max ET55 on an eight inch wide wheel.
@Gordini here on the forum has some 18 inch braid wheels. can't recal what offset they are.