Bike Tools Etc. has thread repair kits of various kinds; here is one:
If you search around the site, there are other options.
Steve Maas (Recovering slowly from the Pasadena ride, with the welcome assistance of various malted beverages, in) Long Beach, California
Richard Robinson wrote:
> Hello,
>
> Can pedal threads be repaired on a Campy cranks once they have been stripped. I understand they may be enlarged if they were French threading, but what about British (standard) threading?
>
> Regards, Richard Robinson
> Jacksonville NC