Does She Said Boom sell noise/industrial/pe/whatever records? I don't think I've ever bought anything there, but maybe I should pay more attention.
I went record shopping in Toronto yesterday. If you're there right now, tell me what you're looking for and I might be able to tell you if I saw it. My favourite short record crawl is to walk Bathurst between Queen and Bloor: that takes you past the original big Sonic Boom (found a FFH LP there!) and near Soundscapes (on College), Neurotica and Rotate This (both on Queen). The Kensington Market has the new vinyl-only Sonic Boom, and another record store called Paradise Bound, but I wouldn't consider it the major concentration of Toronto record stores as Steve apparently found it to be in 2008. Since you're there for a few weeks, maybe check out some of the less central ones like LP's LPs (Ossington) and Vortex (Yonge & Eglinton).