Check out Mediamix Hobby.They have a few bits for the Revell Escort.Photoetch parts and a resin set with seats,steering wheel etc.Just type Ford Escort in the quick find search box on the left and it will bring up the bits and pieces you are looking for.They also do wheels and tyres for various cars.Not sure if the ones you need will be there but have a look anyway.Type wheels in the search box.
Here's the link:
http://www.mediamixhobby.com.sg/catalog