What I got - I bought an existing K75 G/S - one of about 4 or 5 in OZ.
This looks like a husky front, and it is very similar. The headlight, speedo are off a husky.
The front suspension is a white power unit that was bought new as the best suspension available at that time.
The wheel is 21 inch, with hub from a yamaha, disk from brembo, caliper from harrison (6 pot).
The wheel is an R100 GS or R with spacers inside the K hub to fit the wheel to the centre and brake.
The suspension is bascily an R80G/S shock unit and a heavy duty spring for an XR650.
The mounts were changed to obtain the required travel (welding two plates on top of the swing arm).
The rear part of the original frame was cut off and a new simpler and lighter frame made up.
Light and simple is the key.
The seat base is a honda four unit, any light plastic base with a simple mounting system could be used.
The rear mudguard top is a universal with brake light type.
The front mudguard is now a honda XR unit - no holes directly behind the tyre so maybe less mud into the radiator.
The side panels shown are YZ units. I've removed these now as they don't cover the battery area and were interfering with my pannier mounts.
I've made a prototype one on the left that covers the battery area and should match the panniers when both are painted.
These have been extended for the increased ground clearance.