I actually found the specific area of Great Glacier where the Added Cut materia is. It took me a while to do it (basically trying to look for a canteen of water in a desert, wearing a blindfold) , passing out in the snow a few times but I got it done.

OK you have to go to area 10 or come down from area 8 and the first little crosspath (from 10) or the second crosspath (from 8) you come across, it'll be above you in the this little spot and you can see the materia shining, you just have to look hard enough because of Great Glaciers' snowstorm. My heart nearly dropped out of my rib cage finding it. I mean I had to go through almost every part + area of Great Glacier trying to find this materia because I have NEVER found it. MISSION ACCOMPLISHED !!!! I just wanted to give that info out for those who look on this thread and hope that helps a bunch !