I doubt you'll find anyone running real Cossie escort wheels. They will be unreasonably expensive, and IIRC they were 18" x 8" w/ a 25mm offset, not a perfect fit, though they could be used if someone really wanted to.
Pretty sure they are 4x108. The Cossie escort driveline/suspension had a lot more in common with the previous Sierra Cosworth than it did the base Escort at the time.
Man would I love to see these on a Contour. ET 25 would be a pretty mild offset for Contour. It would be flush, if not poked 10mm up front, 5mm out back with about 3" drop. i think it would look killer, and would be worth the money.
They can be found for cheap, you just need to be patient. Central Florida Motorsports just sold a set for $450 in great shape. If I were in the position, they would have been MINE.