Not quite the same issue but I bought a bare Precision AVRI neck off a certain auction site, the ferrules/bushes of the Gotoh GBR640 vintage resolites I was going to use were a rattling good fit. The holes had been adjusted by a former owner using a taper reamer and were now too big. I used a piece of PVC pipe into which the bushes happened to be a tight fit and cut four rings to suit the depth of the bushes. I counterbored the holes in the headstock to be a tight fit for the rings, pressed them in a and voila.