Having a quick trawl around suggests they do more diesel work than Subarus.
Think most people would point you in the direction of JGM, as he's doing scoobs most if not everyday
Mine was mapped by Andy Forrest, again well respected for Subaru mapping.....
Our very own SilverSurfer may be able to help you out too
Again, not wanting to dis a 'busy' mapping company but would suggest you go with more of a specialist / enthusiast route than perhaps a possibly cheaper alternative.......