Here are the parts you are looking for.....
Our Pacific Northwest would probably be the area to search but I don't have a specific source.
You have a wonderful day. Best wishes. Deas Plant.
Hi, Murraycat.
I know they are half a world away but, IF all else fails, give these blokes a try.
http://www.tractorparts.com/
They are in or near some of the logging country.
Hope this helps.
Thanks guys I knew I could count on you for some info.
Cheers Ben