Very helpful info, especially for a newbie like me. I now know exactly what to look for.
However, one question: Apologies if it is sounds thick, but all the space savers that I can find on ebay are 14' and my car (and all the Abarths, as far as I know..) is fitted with 16' wheels. Will the difference in diameter of the space saver to the rest of the wheels not be a problem?