Decent ECU readers, even in the trade are sparse. We scan many vehicles but there are some that require one off machines or the mega bucks ones ($30k+).
Put it this way, even some holden dealers don't have the readers anymore, they go to independent mechanics that have the readers.
Unfortunately the CE does require specific protocol. Luckily enough as they're such a simple vehicle you can generally narrow down the fault without scanning it if you have the time. Or just find a mechanic to do it for you that has the equipment.
Why are you trying to scan it?