Yes, well, a compromise at least.
I forgot to post about them.
When I was getting some O-rings fabricated for the Cherokee, the engineering place I was at specialised in hydraulic connections and hoses. They had a machine there that they used to taper hoses to their connections. I cannot remember the name of the machine, but it was like a bench grinder with a special rig to hold what you are 'tapering'.
I asked if we could try the bushes in the machine and they agreed. The finish is a little rough, but there is about 1mm now taken off the largest / widest part of the circumference of the bush.
Hopefully that should be enough!