Scoobyclinc seems to have built a bad reputation for things of late inc two members on here. I've never used them myself so don't speak from personal experience. But I've know that to be offered more for the 06 2.5 ltr engines when having the head gasket done, only advice I would give either MD Performance or Martin at Sheffield Subaru Services a ring Martins spot on and not much more of a drive.
MD Performance might be a bit closer.