There is also a 3 combiner set of Ko Transformers sold in some Big W's, a car, a jet and a drill/tank.

When my local store was selling them for about $2.50 a pop a few years ago I nabbed a few for painting practice, and they are not even worth it at that price, brittle and poorly made, and as a bonus half of the plastic is the unpaintable variety, couldn't get 4 different types of paint to stick at all.