Sorry! Lost this thread some where... Forums are NOT our thing...
I was thinking you had the 4 x 100mm pattern... Your dealing with the older 80s Subaru... Sorry, I searched all of our wheel suppliers and there is nothing available. Checked out doing the bolt pattern for the wheel spacer. The spacer would be so big that you would actually ruin your wheel bearings.
I asked our supplier for rally car parts too... That was a no go. And they supply crazy stuff too. They suggested you convert to the newer Subaru hubs. Not sure how that would work... We are not Subaru guys... But I think your talking big dollars. While the hub and spindle may convert over, axle shaft splines do not and the shock mounts would have to be the racing style. Is your car worth dumping $20,000.00 into suspension and hubs?
So what is the main problem with the wheels you have? I think your running 14 inch tires right? BF-Goodrich makes some great tires in that size.
If you were dealing with a newer Subaru, we could get crazy. From limited slips in the front and rear with a locker / limited slip in the middle, stronger tranny gears, turbos, 14 inches of travel, race shocks, sub frames, cages... ETC.
Sorry we dropped the ball. Not sure how to link to postings. Maybe we can't?
Good luck!