Frank Bamford says:
A fellow enthusiast….. I have an early model Austrak RT45 with MT500 motors which I have put new seals in but still have a problem with one motor which I have narrowed down to valve body (I think).
I am wanting to find somebody who can help me with parts/knowledge to fix.
I also have a later model chassy & some parts, not enough to rebuild but could be helpful to others.
Hope to hear from somebody!!!
austrakwildcat - email austrakwildcat@gmail.com 
Hi Frank,
Austraks huh? Don’t you love them?
I’ve got an early chain drive RT45 with the 40hp air cooled Lombardini in it.
She still works (just)
It has a T stick instead of the servos
One of the drive motors is leaking and its drive pump also leaks.
I’ve got a few spare parts plus loads of Lombardini engine bits, enough for 3 engines.
I’m interested in your spare chassis plus whatever parts you might have.
Have you checked out Surplus Center in the US?
http://www.surpluscenter.com/item.asp?item=9-1741-B&catname=hydraulic
Feel free to get in touch.
cheers
Rob