I was wondering what all other cars share our bolt pattern to make wheel shopping a bit easier.

Lincoln LS, Jag S-type, all 5-bolt Volvos, '92+ T-birds, '92-'97 Cougars, Windstars, and of course, Sables.

what is the maximum wheel height and width you guys would go with?

Anything more than 18 probably isn't good. Might have some clearance issues.

18x7.5 is about as big as you can go, although some people have put 19x8's and 20x8's on them