Might try a wrecking yard to find a stock wheel cover, or if you're looking for a change, a set of Ford wheel covers from another vehicle (like the Focus). At first, I was running with chrome trim rings on the steel wheels for an old school look. But the paint on these wheels is sprayed on very thin and they soon began to rust. Now I have a set of eBay covers. Probably your cheapest option. I picked up a set for something like 30 bucks.