Are you near goose pimple? I can recommend a goat vet in Kinross, who I know are ok with disbuddings. Probably too far though.
We have disbudded pygmy's occasionally, normally we leave them til they are a bit older than the vets like, about 2 weeks old, use the same size of burner as for the bigger kids (we use a small size calf burner, for which we have the bigger adjustment to make the bigger size). Do use a bit less anaesthetic, we use a local.
Beth