Powercycle in the suburb of Bayswater (Melbourne) is my supplier of engines, and engine kits.
Powercycle can now get access to 66cc engines with the integrated CDI/Magneto system (the same concept used for chainsaw ignitions), though i haven't yet installed it in my bike, despite having acquired one of these new generation engines just a few weeks ago, as i am waiting for my current engine to wear out; which is taking a lot longer than i expected it to last.