Reported working by Jan Gnapp in fb group:
   * https://www.facebook.com/groups/209280506324242/permalink/351053958813562/

According to this report, Mini's firmware 1.2.0 is more then recommended: "One mistake I made was that I had the old firmware version whereby the stick doesn't move in all directions however with the latest version (only) the stick works perfectly fine." Reported here:
   * https://www.facebook.com/groups/209280506324242/permalink/359212857997672/ 

Found here:
   * https://www.ebay.co.uk/itm/292829771510
   * https://www.ebay.co.uk/itm/173724109139
   * https://www.aliexpress.com/item/Gasky-Acrylic-USB-Arcade-Fighting-Joysticks-Controller/32843231845.html