This issue was brought to oasis attention the very moment ninja exams 121-140 appeared, but none moved an inch. Currently you can get scrolls of super sage only in ninja exam 140. Btw, currently scrolls of sages are way better than scroll of super sages after you ranked up all the equipment for the simple reason you can sell them in space time shop while you can't do it for super sages ones. I suppose if is not a bug then that's the reason.