That sucks, but is understandable. I hope Valve can do something positive like buy the design from Dbrand then sell it themselves. Then Dbrand doesn’t loose a bunch of money, Valve can protect their IP, and fans can buy the fun thing they want. Seems unlikely, but it would be cool.

I just googled that model number and “Linux support”. The first result was the Brother website for driver downloads, which does include packages for linux.