I'm not sure what kind of leather accessories interest you, but I've been pretty pleased with the quality of Montblanc's leather on their wallets, etc. There appears to be a fair amount of Montblanc products on ebay at pretty low prices. dan
well hermes and valextra are considered likely two of the finest leather makers add berluti for its new line of accessories for men, tanner krolle, goldpfeil and even lambertson truex martin dingman makes some nice leather accessories (former designer for coach) which appear regularly on online sites
If you are looking for a good jacket wallet i would try ettinger of London. I have just bought a leather wallet of them and its surperb they have been making fine English leather goods since the 30s. They have a web site. www.ettinger.co.uk
There is Ruffo which manufacture's Versace's Couture leather clothing items. Also Schedoni, Lambertson Truex, Gold Pfeil, Pineider, Hermes, Goyard, Valextra, Swaine Adeney & Briggs, and there are some others. That MontBlanc item is a fake.