Search Tire Rack for Fiat 500X. They have 5 on 98 and a few styles available. You will need to grind out the center bore a bit or run 1/4 " spacers. They were under $100 per wheel when I last checked. I run with 205 45-16 tires and clearance is good.
84 Spider - Long gone, but started the addiction; 85 GTV6 - Current project, Supercharged, Mega Squirt; 88 Verde - "Milo" It has a name, must be a keeper