I believe that it is on top of the fuel tank - a real pain to get to.
Why do you think that the canister is at fault?
I got a fault code a few times that made me believe that it was the
canister. Turned out to be a canister vent solenoid that had failed. That
was much easier to replace.
Oppie
Evap canister on my 92 SC is in the engine compartment (or below, I can't
recall) on the passenger side, near the washer fluid tank.
If you need a replacement canister, purge solenoid, etc - I have them from
when I took them out of my 92 SC (when it became a track-only car) that I'd
be willing to sell for a reasonable price.