[Dollarama] [YMMV] Dollarama - Thomas & Friends (Trackmaster motorized trains) $4
I believe these cost between $10 to $20 a piece elsewhere.
This is a YMMV but it is good to know that it may be possible to find some. Sorry do not have a picture anymore. Gave it to my nephew same day and he went crazy and played with it right away. Happy searching!