Hi Joiner
I am assuming these are hand brace bits rather than machine auger bits?
If you don't mind spending the time with a fresh file you can probably recut the blade part and form new spurs. Might look horrible cosmetically but should be OK - certainly for use in softwood.
Failing which you have some shiny toasting forks.
If you look on Alfs website (Cornish Workshop) I think there may be a download for the old Ridgeway sharpening guide. If not have a look see at Toolemera.
Best regards
Lawrence