I have not heard of him or his kits. Some more of the Don Brown kits popped up a few years ago and were being sold by The Gunwerks in Oregon. Joe Williams has passed on since then but his wife Susie might known the source of the AH muzzleloading kits. I know the Don Brown kits were very well thought of. I have a rifle in right now finished from one of them and it is very nice. Good luck in your search and lets us know if you find Mr. England and what you think of his kits.
Steve - - Thanks for your comments. I understand that Rod England bought Don Brown's equipment and is producing a kit of the same quality. I may have a lead and will try to reach him over the next few days. I saw one of his rifles on the American Longrifle website.