If you don't mind a run up 70 N to Frederick, there's a place called Foreign Auto Excellence (I think that's the name). I've never used them, but the prior owner of my '92 had them install a Suby rebuilt tranny over 5 years ago. No complaints yet. I think they have a certified Suby mechanic that has seen more than one SVX. I also had decent work done at Heritage Subaru in Owings Mills, but that's a tad further in the Baltimore direction.
Have fun.
Ron.