Those windicators are awesome, as are the up/down indicators for downdrafts and updrafts.
My local range's rules will not allow metal stands for wind flags. So we can only use wood or plastic. One of the guys at our range who is a genius with making stuff, made some windicators with the 180 degree arrow gauge, all out of PVC pipe, wood, and plastic parts, and they work great. But they are more fragile than the metal designs and some have been broken as they are moved around in and out of storage.