Hello Alan.
Mike Norris is the working partner in Brock & Norris gunsmiths and used to be in Buttery farm but now has a shop in Whichchurch.
Some phone numbers for him are
01952670198
and
07871169829
i dont know if the numbers are current or not but its worth a try
he used to be a stalker for Deerstone Deer Services ( dont know if the speling is correct )so perhaps they have a phone number for him
Wally