If you know of a good precision grinder it may be possible to get the standard bearing quoted ground out in the bore from 1″ to 1 1/16″. Possibly a last resort as the experts will comment on concentricity etc. but it will keep the bike running. One can fill the space where the balls are with wax of carefully dismantle the cage.
I have had this carried out on a taper bearing for the headstock of a Velocette where the top one is the standard 1″ size but the lower one 1 1/16″
