i got mine from mcmaster, and had to run the bushing on the wheel to grind it down EVER SO SLIGHTLY. great company, and fast shipping, just a milihair too wide.
I mic'd the bolt that goes through it, .247" and it is snug. The spec on the bushing is .25 and the tolerance is .0016 to .0013", so I was thinking just that.
Thanks for the input.