I found out some information. Through friends of friends I got in touch with the folks at Walton and Taylor, it turns out that they are (were) a subsidiary of a company called "Lost Battalions" who do WWII gear, particularly uniforms for German reenactors. They do very nice work and I knew of them from years doing British Airborne Recce reenacting. Evidently times were a bit hard for the company and they were thinking of selling up but word got around and orders started to pour in so they are just reorganizing. However, it seems, Walton and Taylor will not survive the reshuffle. Lost Battalions branched into the old west business because one of the principles was interested and had some historic connections, but it never took off. They say the patterns still exist and there is some vague shuffling about how it might come back etc., but it feels like Walton and Taylor is dead.
Luckily, I was able to get in touch with them just as they were cleaning out their stock on hand and they had exactly what I wanted at a reasonable price so I bought it. Just waiting for delivery.