Does anyone know if any company makes 1/72nd scale MG barrel magazines? If not any input on how to make them?

I don't know of any that come in kits. I used sandpaper on a piece of plastic rod to make a 50 round drum magazine to go on a MG 34 in the back of a Hasegawa Kubelwagen. once I had it into shape and glued on, I used the tip of a #11 X-acto to make theside corregations and made a carrying handle on the back side out of a single strand of copper wire