I need a new seatpost binder bolt for my old Mondonico. The old one is Sugino, and it fits a 7-mm hole. Campagnolo bolts require an 8 mm hole, and I'm reluctant to drill it out. Several Suginos I've seen lately have been too long and have a tang for securing the fixed end, but my seat lugs do not have a notch to fit a tang.
Are there different campy bolts, or anyone know a source for Sugino bolts?