Does anyone happen to have any used Cube 3rd Gen or parts? I am looking to replace the stepper motors as those on my printer have had the square shafts worn down to circular, therefore they will not engage with the cartridge.

consider contacting a stepper motor manufacturer like pololu and ask if they have any with square shafts.

I am wondering if the printer nozzle is available from some manufacturer. After several disassembles to fix jammed filament I am becoming very familiar with it. It looks like very basic hardware. I am a design engineer and the nozzle reminds me of something else though I haven’t been able to put my finger on it yet. If we can find sources for parts we can keep these things running for a long time.