You can just purchase a net from the local hydro store

My SCRoG is a hand built wooden SCRoG ~ 3x3 and it fits onto my DWC bucket lid so it stays rigid to the plant and it can be rotated easily in a 4x4 tent. It has very large squares 6 inches apart so i use bamboo dowels in between. 6 inches is way too big. i think 3-4 inches would be ideal