I was gonna link to that thread, but Ray beat me to it. Valenite and most of the major insert suppliers have HSS bits in their catalogs. I dont recall off hand exactly which book I was perusing, but they had Carbide and HSS in columns by size and profile. HSS bits are less available in all different sizes and configurations but do a great job if selected properly for the job. Carbide is great, but nost smaller lathes lack the available horse power to capitilize on the increased depth of cut and higher feed speeds.
Bob