Wheel hub cover

Hey does anyone know of a means to cover your centre part of your wheel? I saw previous images of this cars wheels and thought that it may be a cheap way to get away from the standard wheel look for now. I have asked around a bit but have not been able to get an idea of where to or what to get to cover the centre of the wheel. I am not looking at using some lame type of cover like a PVC pipe cut down as that would look rank. I did see a little Renault panel van with a centre piece over the wheel but thought to buy those may be as pricey as buying mags. Any good ideas please advise me?

Older mirages had them but I can't recall ever seeing ones like it for sale. Check out eBay for second hand wheels. Forums of cars that have the same stud pattern is also a good place to look (MX-5 forums, Pulsar forums, etc.)

---dens