I had problems with a cherished supplier's silentbloc bush - undersized o/d, oversized i/d (it was a near metric version) so measured and drew up the correct item. One manufacturer lists the exact bush but requires a minimum order. The solution I found was to buy a couple of, relatively easily found, Ford bushes, which are correct except length, and turn them down in the lathe. So now our Pearl has a bush that fits tightly in the anchor and the bolt clamps properly.
If anyone wants a copy of the drawing just let me know and I'll email it.
Hope this helps.

Location: Beautiful North Hampshire

Hugh,
Would not the simple solution be to find a bolt which is a snug fit in the bush
then bore the brackets to fit.
J

Location: As far east in Kent as you can get

I am getting the correct size Silentbloc bushes made at the moment and hope to have them available soon. Sorry that I can't give an exact date but I'll get them as soon as I can.

David

And as with all Silentbloc bushes the bolt should be finally tightened with the axle in normal position ie not hanging down with the car on stands.

Location: Auckland, NZ