G'day gents and gentettes

My father has recently joined a local trials club, and is in need of a bike. He has recently owned a ~1973 TL125, but sold it.
We are currently looking for anything that can compete in Classic Trials (twinshock and/or air cooled), under $1000. Doesn't necessarily need to be in Waikato, but can be as far as Auckland, or possibly wellington.

Cheers