Perixx PERIBOARD-409 Mini Wired Keyboard with 2 USB hubs\\
http://perixx.com/catalog/product/view/id/384/

Reported by Pascal De Maeseneire in fb group:

  * https://www.facebook.com/groups/209280506324242/permalink/281927989059493/
  * https://www.amazon.com.au/PERIBOARD-409H-Mini-Keyboard-Port-12-40x5-79x0-79/dp/B007LQN8UU/ref=redir_mobile_desktop/357-3184990-7965338?_encoding=UTF8&fbclid=IwAR2SyaSi0vbFLPTeeSxPXFB0y9nlWTqIou5Ff9fWpRz_d4lP-w2f72nDNEg&psc=1&ref_=oh_aui_i_sh_post_o0_img

Reported by more users at Forum64.de forum:

  * https://www.forum64.de/index.php?thread/66521-the-c64-the-c64-mini-nachbau-mit-geh%C3%A4use/&postID=1313586#post1313586