Teng Tools has the TS 1218 at 1/2 inch drive but only a couple more socket sizes (21+24mm) plus 3 long 17,19 & 21mm. Working on deck equipment on small yachts I would prefer something non-magnetic but that is not the real issue. The Gedore marine line has been dropped and for a good reason or at least in my case: The coating did not fare very well in prolonged usage. I had a few pieces but after the first couple of months it wore away and the results of the marine environment on the tools were similar -if not worst- to the CrV coated tools. IF someone is dealing with inox fittings and screws on a regular basis at work then the Stainless route is the one that balances cost and endurance.
Anyway, the only other manufacturer that offers stainless sockets is KS Tools. I am looking for something like the TS 3816 set to compliment the Hazet Hinox at 1/4 drive and the Beta Inox wrenches and screwdrivers that I already have.