Thats not strictly true, if you still to OLDER fiat, alfa or lancia wheels you will be ok. Newer fiat wheels, like those on the grande punto, have a much smaller center bore (the hole in the back of the wheel that fits around the hub) so they won't fit.
Your best bet is sporting alloys of either the mk1, mk2 or mk2b sporting. I had the wheels off a bravo HLX on my old mk1