Medic,
Harden them yourself. A propane torch, needle nose pliers, coffee can (or the like) filled with used motor oil. Heat the screw to red hot , drop in oil. Easy as falling off a log! Mount screw in a drill motor, using steel wool or one of the various scrubby pads, clean the dark scale off the screws. You can finish the screws by using various grades of sandpaper. Color with Cold blue, or the same torch can be used to "fire blue" (gotta be careful as the color range happens quickly). For fire blueing, just slowly heat the screw and as soon as it reaches a "straw" color, it will quickly proceed through a range of colors. When the appropriate color is reached, quinch in water. If you blow through the colors by keeping the heat on too long (it'll return to white) go ahead and quinch it, you'll have to "descale " again (evèn though you can't see it) before you can attempt to re-color. A little practice and patience and you can make some great looking, hard screws. Your action will feel a little better with hard screws as well.
Mike