lol well theyre semi hard to find. sdgc will be running some in the future i think,disc golf u had some king masher flat tops but theyre out . if you cant find flat tops try the flattening technique. it wont be super flat but it will be close and still be nice none the less. ive come across some flat as a pancake reg dx runs that fly nice too. you lose glide but you gain some speed witht he flatties.
just flip a roc upside downwith the bottom up ,get some hot water, place a cookie sheet or what have you on top,then place something heavy like a phone book and a gallon of water or a 5lb weight and wait for an hour or so. voila, generic flat top.