Umm, if you mean the bushes in the pulleys you originally had in the as the idlers PLEASE DON'T at this stage. I've got a sneaky suspicion those are the pulleys that go in the cutter clutch- and those bushes will be needed.
Dimensions for the bush we are talking about aren't super critical. From memory it's a 3/8" ID for the bolt ( please check) and the small outside diameter is the same as the slot, of course. Height of the small diameter is such that it's slightly more than the thickness of the material the slot is in - maybe a maximum of 1/16" more. Large diameter section needs only to have enough diameter and height such that it will give sufficient strength and bearing area. I'm surprised I can't lay my hands on one. I'll check again.
I'll send you a PM as I'm going to need an address to send these bits to
