The 6x59 mm bolts do not show up on the usual site for OEM Honda parts.The gasket shows like it is no longer available but every aftermarket gasket kit I ever bought for the 750 has it .It wouldn't be a hard one to make yourself. Just make sure you get gasket material that is close in thickness as too thick a gasket might move the pump drive gear too close to the kick start gear that drives it. The o-rings on the pump covers are 2x46mm .