@donvukovic Hi Don,
Yes, the Duet 3 6XD is an active/available product. Here are a few North American vendors:
https://www.filastruder.com/collections/electronics/products/duet-3-mainboard-6xd-no-stepper-drivers
https://hartsmartproducts.com/products/duet-3-mainboard-6xd
https://www.matterhackers.com/store/l/duet3d-duet-3-6xd-3d-printer-controller-board/sk/MC5N34W5