oigawa thomas b-train shorty

I wonder if you could convert one of these to run on a Plarail advance drive unit? I doubt somehow the carriages would be long enough, but its an interesting thought.

Alternatively maybe one of the Tomytec moving buses chassis could fit, may have to have a think about this.

Incidentally I recently got the normal scale Tomy Plarail version of this train, highly recommended as the loco is quite a bit nicer than the standard tomy Thomas