Hi Bob,
Yes I have dealt with this company a number of times, and found them to be responsive and reliable. Had a problem with the workmanship on convertible top wood pieces for my BJ8, and they refunded my money with no questions. They have a North American distributor called Autofarm, which is in rural Ontario Canada somewhere, so you "might" get a better deal on parts, given the sad state of the Canadian dollar versus the $US. Shipping and duties from Great Britain will likely double the cost of purchase. Their phone number in England is 011-44-1788-565000. Normally takes 2 to 3 weeks for shipments to arrive. An alternate parts source in England is AH Spares, owned by Fred Draper (now deceased), who worked on factory Healeys when Donald Healey was running the show.
Just a question though. Why not source your parts within the US? Seems to me that you may do better, in terms of prices and shipping. Might try the Little British Car Company, run by Jeff Zorn. He's a Moss distributor, very easy to deal with, offers a discounted retail price on Moss products, and is super quick on orders. I have no affiliation.
Just to advise you that dealing with companies in England doesn't necessarily mean that their parts are made in Britain. They'll source from Asia as well, to keep costs down in a pretty competitive market. At least that's been my experience.
Regards
DB