You are looking for wheels with a 5x100 stud pattern and aroudn et35 and a centre bore of 57.1
You could also fit spacers and adapters to fit almost any stud pattern to adapt it to a 5x100 pattern but you will have to keep an eye on the offset.
You can fit up to 8.5 inch wide wheels on an a2 without rubbing and only a slight modification of the wheel arches liners but again will depend on the offset.