
I have a 24.5 mm drill bit and M26 x 1.5 tap available. I imported them both new (tap is British made) and they've been used only once. These are needed for fitting Amsoil dual bypass systems as well as the Frantz "sandwich" adapter, from what I can tell, to Delicas. In either case, best done by a qualified person with the right shop skills and equipment.
I'd offer to lend for free but I have no way of knowing they'd be properly used so I'm offering for sale. $50. firm.
PM me if interested.
Cheers!