1964 VBB2T - SIP PERFORMANCE Front Shock Absorber


I am having an issue with the SIP Performance shock absorber mounting. The stock upper and lower M10 bolts, and SIP listed replacements M10x1.5x27mm and M10x1.5x61mm, will not fit through the upper or lower hole. The bolts are 1/4mm larger than the shaft they are meant to mount through.  What have other's done to fix this issue? I cannot find any solution from SIP's inventory.