if you want to fit AU rims or Jap car rims to the EA-EL you have to get adapter hubs. These are different to spacers. If you had a spacer, it would have to be 30mm thick because of the different offset the EA has to the AU, and the wheel would have absoloutely no bolt to hold onto.
On the other hand, adapter hubs have another set of wheel bolts coming out of them and inbetween these they have holes for your existing wheel bolts. So you bolt the adapter hub to the disc brake assembly and bolt your AU/Jap wheels to the adapter hub. $450 was the cheapest I could find them at Factory Direct Wheels and Tyres. Otherwise, you can get an engineer to machine some up but it will probably be over $500.
The good thing about the EA-EL offset is that you can get deep dish wheels, so a lot of the American Billet style rims will fit.