First, I have heard from dealers and fans that Bill at GEC is not about high end steels, he is about carbon steel. 440C and O1 were supposedly like pulling teeth for him. As a fat guy living in the humidity of central Maryland, I would like to see more stainless steels used, but as of today for carry rotation, I've got one 154CM knife, the rest are all D2, O1 and a new 52100, and carbon damascus. They all ride in my pockets, might as well be death to carbon steel in the summertime.
I would go to a custom maker and get what you want. You will have better fit and finish than even a GEC, and you will develop a rapport with the maker. Also, there are plenty of up and coming makers out there that put out excellent product, but their prices are comparable to a Northwoods or used Case Bose annual.
Traditional designs do not always have to have carbon or tool steel blades. However, I do appreciate the nice look of a carbon steel blade with a patina. Have you looked at Northwoods, or Queen's Schatt and Morgan/Tuna Valley line? What about Canal Streets D2 line? Case Bose annuals in either ATS34 or 154CM?
If you find custom quality at production prices, buy everything you can from that maker, because they will become quite popular very fast.