More years ago than I care to count, there was a place in Squirrel Hill (Shady near Forbes?) that changed hands in 1992. The outgoing owner was Michael somebody (?) who introduced me to high-end audio even though I was a poor grad student and couldn't afford much beyond the barest mid-fi equipment. I don't suppose it's still there?
There was also (at least briefly) a tiny little place nearby on Forbes, upstairs in the back of a building, in maybe just one room. The guy strikes me as just the type to get interested in SET (not sure why), but alas the place didn't exactly radiate business acumen (no disrespect intended -- the guy who ran it was friendly and helpful).
But after such a long time I regret that my nostalgic rantings probably won't be useful to you ... good luck!