I know this goes back a few years, but any chance you might have access to the part # for the 20mm bolts you used?
The part number I found in the Subaru parts list 901120036. But those bolts are 26mm long and are rubbing the backside of my rear rotors, causing a horrible grinding noise. I suppose I COULD use a washer or two to "shorten" the bolt, but I'd rather use the correct bolt.
Many thanks...