John - A few years ago I had a problem with the "black ball" connector. and I could not get one anywhere. I visited a local DIY near Bogna Regis and bought a Tap Washer and a long galvanised roofing bolt and nut. I fitted the washer to the bolt and it fitted inside the tube. thought it would not last five minutes but it lasted until Isold the awning 3 years later. Hope it helps