Ros Prince in AU is right next door.
There is little in the way of CCKW parts in the US. Junk trucks, sure, but you are not going to find much in the way of rebuild parts. I have to get parts from Mr. Prince and Mr. Ward in the UK. And the exchange rate is significantly worse going form USD to AUD.
If you know of a place that has NOS rebuild parts (gears, brake, engine) let me know. The 'big 2' in the US are Vehicles of Victory (few parts, mostly take off) and Army Cars USA (some sheetmetal, but mostly complete trucks that are overpriced). Frank VonR. is in Canada, but shipping is almost the same as from Mr. Ward in the UK.
Your rebuild prices are not going to change my mind. I have been working 4+ years simply getting the proper parts TO rebuild. Give me $30k and I will build a factory correct CCKW to spec and have it shipped to you.
Unless we are talking $60,000 Zimbabwae dollars? Even if NZD is what you meant $60kNZD = $50K USD.