GRO

Hi. Does anyone know where I can find some black plastic C shapes, about 10mm in length. Not the open mouthed C shape of this font but the long narrow style like in the fonts known as "IMPACT" or "HAETENSCHWEILER" in MS WORD. I need about 100. I want to use them to hook garden netting together, under tension, and be able to undo them easily. I have spent a couple of hours searching on the internet and drawn a blank. Any help would be gratefully received. Thanks