Dude. You're in SoCal. There are plenty of other Subie tuners around you. I've looked a while back, a quick google will yield plenty of results. Call up a few and get an opensource protune. IMO an Accessport isn't worth it. You're gonna flash once, do a few datalogs then throw the thing in your glovebox(where my tatrix cable is not)
Plus I doubt Cobb will be able to give you a proper map for your upgrades.
Yimi(eventhough are very reputable) said there isn't an opensource solution, I call shinanigans. Go else where. Plus any reputable Subbie shop will be able to tell you if it has been properly upgraded or not.