Garrett 4CD Governor Parts

[garrett4cd]

I am looking for a few parts to allow me to finish the fitting of pickering type governors to our Garrett tractor, another step towards being as close to the original specification as possible. The parts I am looking for are:

-the small brass thumbscrew common to most pickering governors, that adjusts the spring tension on the valve spindle.
-any of the belt pulleys, either the one on the governor, or the two on the countershaft attached to the trunk guide.
-the gunmetal/bronze casting for the valve- the part that actually screws into the cylinder block casting.

If anybody could help with any of these parts, or knows anyone who might be able to help, I would very much appreciate it if they could contact me.

Thanks,
George.