Or you may want to try calling Diversified Products Marketing in Michigan. They have an add in MM&FF so you can get the number from there.
I purchased two extra "pony" wheels from them about 2 or 3 years ago and was very pleased with their service and prices. The wheels were in original Ford boxes and had never been opened. I picked them up at the Ford Swap Meet here in Columbus, OH (every April) for $125 each.
Good luck.

E
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1991 5.0 LX Coupe -37,800 miles
13.17 @ 106.14 mph w/ 2.138 60'
Pro-Charger D-1SC on the way!!!