I'm sure you could just use some pond liner ( you can get it at rona I think) And cut that into a decent track. get new a new rear drive shaft, artattack anti ratchet track pulley + a new pinion to go to the gears. All that would be a bit of a struggle would be the holes in the track for the pulley. Maybe then you could put some more length to that track too
This is an 14.4V e-Maxx esc but it looks a tad different than yours. Will it work?