Yes... Toner will work in LJII/III, the same
Cannon engine as the old Laserwriters.

Also, if anyone has one of these printers
and needs a fuser, I have 5 or 6 SX fusers
sitting here yanked out of dead printers.
They are all fairly new, since we did our
own printer repair at work, replaced the 
fusers, and then the printers died for other
reasons (dead Scanner assemblies, etc), which
we decided were not worth fixing.

Anyone needs one, its yours.  Or more, I'm
just looking to get rid of them since I don't
have one of these printers anymore.