Would have to agree that our guntrade appears to be fairly disfunctional! There appears to be a massive shortage of capacity to repair & alter guns and no one really doing anything to fill the void .It must be viable given the amount of work backlogged to run this sort of operation..The difference with Essevierre is that they're not solely dependant on bespoke stockmaking or alterations for their revenues. They also make production stocks to a high standard for gun makers such as CG which means diversity, economy of scale and buying power with the wholesalers.
Specialist suppliers such as Essevierre or Giovanelli exist and thrive because Italy has a gun making industry. If we had a gun industry in this country producing decent guns for the masses we'd also have a functioning out source industry including stockmakers.
All very British !