EDIT : FOUND!
In the Toronto area (Mississauga), looking for:
Rumble
Frenzy
any series. loose or used is fine.
but: -must be legit, no KO or china (worried about lead paint,etc, if kids lick or bite)
The kids are fascinated by the casettes in transformers and we've unfortunately never picked them up.
Let me know if you got them thanks. They'd be stoked to see these for Christmas. Ravage/Laserbreak are nice to have, but not key.