Marley folding door - door knob axle support

Support for the standard door knob of the Marley Eurostar folding doors. The standard metal axle holding the two door knobs together broke the original plastic twice for me in 2 months, resulting in lose door knobs that come apart quite easily. I've designed this piece to fit inside, provide support for the middle plastic piece of the knob holding the axle and also function itself as a plastic axle.