Not positve about all this, but I think that all rims from any taurus will fit another, rims from a the earlier thunderbirds, and ones from lincoln mark VIII's. I think the bolt pattern is 5x108 and I'm not sure what the offset is.
All Taurus wheels 86-04 are 5x108mm or 5x4.25 (same thing) with a 35-42 offset generally. All Taurus wheels are interchangeable, with the exception that Gen 4's require atleast a 16" rims because of the size of the brakes. Also, with your wagon, you have to watch the width of any aftermarket rims, as the lip on the back of your wagon may not allow for wide wheels. I can find a list of most of the cars, but I don't have the resources at the moment, because im not at home. Older T-bird wheels work on the taurus, not the newer ones though.