Sounds like they were the same as these :-
Deep Dish Mustang ® Cobra R Wheels 18x9 & 10 inch 2005+ - eBay (item 290500067547 end time Nov-18-10 20:47:59 PST)
How did you find out that they fit. I'm in Australia and if I screw up it's going to cost me a bomb.
Thanks again,
Glynn