This is probably the simplest repair part I have ever made, but it works and saves a lot of frustration. It also epitomizes reasons for buying a 3D printer. I've made knobs and handles for tools, sink and shower parts, outlet and control covers, nylon pads for outdoor furniture and numerous other very practical things. This spiral printed part is the simplest ever, being just a small cylinder approximately 20mm wide by 20 mm high. It fits snuggly over the end of the rod that holds the basket on the front of my husband's walker (see pictures).

The original part is shown here.