Monte, the handy endy are still in production with part no's 4401 (6 point) 4406 (12 point) metric & imperial. The standard smooth (none handy endy) part no's 4400 or 4405.
Ko-ken now produce 3 catalogues and they do vary from country to country. The catalogues are......Japanese & English.....Spanish & English......and German, French & English.
Ko-ken have made a 3/8" drive version with Knurling & full polished chrome in the past called the EXTRA sockets........Extra chrome....Extra Knurling....Extra short...
Has anyone come across the LHSTIX sockets as far as I'm aware only Ko-ken has the licence to manufacture this type of socket.