Hi Ian,
Just looking over the web and the link below might be an Australian source of the bushings you need.
The attached photo is a spare of the bushings I used on my F15-A. Almost certainly obtained from Pedder's Suspension.
It is identical in height and OD but the ID is marginally smaller. A bit of rubber grease slipped it on. The raised shoulder actually works a treat in centering them in the lower spring plates. Better than originals.
Their list of vehicles they fit covers Fords well back into the seventies and therefore they could be the ones Pedder's gave me back when a lot of those earlier Falcons were still around.
It might be worth a call, and hope someone is willing to supply the measurements.
Glad to hear the other spring bushings I sent did the job.
Cheers,
https://automotivesuperstore.com.au/...iABEgLlFvD_BwE