will these fit a standard 1.2 fabia?

Yes.

i know there is some height different between the standard and the VRS, does anyone know how much and how this will effect the coilovers? i think they are 30mm - 100mm (for the vrs obviously)

They're adjustable so you can set whatever height you want, the front springs might be a bit firm since the 1.2 is a much lighter engine.