I have a set of these collapsible baskets with completely inadequate handles that have broke on every basket. So I designed these replacement handles.
Clevermade Collapsible Shopping Basket
The handles have recesses so the baskets still stack together like with the original handles.
The handles are too big to print on my Ender 3 so I split them up and joined the pieces with CA glue. I also provided a full size STL if you have a larger printer.
I used the following hardware to attach the handles.
The author marked this model as their own original creation. Imported from Thingiverse.