You have a choice of getting custom offset rims, RWD offset rims (Might not be the full 2''s?) , or using wheel spacers, which you have the choice of changing bolt patterns. I hope this helps, its a little vague, but its to the point.
As for experienced dealers, any wheel / tire shop in your area should be able to take some measurements for you and get you exactly what you need.. Besides measurements got 20x11's to fit on madcurls ride! Maybe the coilovers helped a little bit 
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Custom Fiero Fiberglass
[This message has been edited by Custom2M4 (edited 08-20-2005).]