I have 2x 2.6m stands I am happy with and wish to use them as backdrop stands. Not long ago I remember finding adaptors and crossbars to adapt them to this purpose, pretty sure on EBay. However, now I can't find anything of the kind. Am I searching for the wrong thing maybe, searched for 'backdrop adaptor' etc to no avail. I don't want to have to buy a full kit again as I'll end up with too many stands for my purpose (already have others that I intend using just as stands).
Any suggestions on where I can find these adaptors and crossbars? I tried adapting PVC but it seemed to not be solid and flex too much.