Geez, quit yer incessant whining already.
Get off yer sorry, whiny arse and face reality. It's a gone media.. .finito... it's an ex-media, it's shucked off it's mortal coil. You're lucky SA is still available at all.
If I were you I'd be scouring the web for any dealer that wants to sell to you in Canada instead of expecting everyone here to do your work for you. Don't you have google up there?
People are giving you good advice but you don't want to hear it.
Move on and try other tape formulations that ARE available. TDK-D is readily available and, for demos, those bigwigs care less about fidelity than chops. If you have to have your deck recalibrated for the new formulation, suck it up and go for it.
Or, like someone else said, invest in a CD burner. Why you choose to ignore this excellent advice is beyond me.
You come here and, in your first post, pose a question. On each subsequent post you seem to be waiting for, no, you are actually DEMANDING, someone tell you what is and where an exact replacement can be found. Don't hold your breath, kid. It ain't gonna happen. Cassettes aren't the big thing like they were 20 - 30 years ago. They don't offer the wide selection of exotic formulations they did.
Welcome to the 21st ecentury and the digital age.