There are non keyed binder bolts out there, I can’t recall the name though. You can always file the key off a Sugino. I have one bike that I ended up using some form a bolt with what I’m pretty sure is a chainring nut.
For the record, I’ve never broken a Campy binder bolt, but will now carry a spare because I’ve just tempted fate.
__________________
N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur