I got my steel pop 15 inch wheels from 500madness (great product and service). I put them on my sport. i did go for the wheel covers as the steel rims were just basic and did not compliment the car with out covers. On note on the least expensive covers from fiat ($35 each); you need to remove the wheel bolts to secure the wheel cover. A bit of a pain in the *** but it works an you won't have to worry about the wheel cover faiiling off.
thanks for the direction - i did see the image there. i think i'd ditch the hubcaps and paint the wheels a gunmetal color, and add a nice set of lug nuts and it would look pretty cool in a retro sort of way!