You have a couple options for rims, you can redrill 2 holes into a 6 lug Chevy/Toyota/Nissan wheel, or drill 4 holes in the Subaru hubs and add 4 studs to make them 6 stud, or find Pugeot wheels. I redrill hubs and install new studs for $60 with cores right now, if you are interested...
-Bill