Check with Texwise in JHB. I bought 2 long ones for mooring(they had all different shapes and sizes when I was there), they should have others. Not sure exactly what shape or type you need or what for.
I see you are in Shelly, if you not in a hurry I could bring it down if you find what you need from them. I will be coming down, to Hibberdene at the end of June beginning July.