I found little on the internet about James Young so have gone to the sleeve notes of this Emerald Gem LP from 1970, found recently in a charity shop.
" This Lp "The Ballymena Cowboy" is a follow up to "Behind The Barricades". It is true to say that no other artiste, including The Beatles, has sold as many records in Northern Ireland. We feel sure when you listen to this LP you will know why, and we hope we will be favoured with many more LP's as this from James, in the years ahead."
I'm not sure if he made any more but very surprised he out sold the fab four in Northern Ireland!