A mate has an original one. Pretty ratty to look at, but does not appear rooted.
Intermittent spark and/or kills spark plugs - apparently it runs great sometimes and not at all at other times.
If you're interested, I can sound him out. He's definitely looking for something (anything!) he can get on and ride, so you'd probably have some leverage if you had something to swap. Wouldn't have to be a vintage bike, or even an MXer.
Bike is in Goulburn, NSW.