USB Audio Interface (DD 5.1)

Is anyone aware of a USB Audio Interface that works with the Shield TV and Kodi/Plex that is not the Turtle Beech one.

That one isn’t readily available in the UK and it insanely expensive for what it is?

Their are a load on amazon et al, but I have no idea which ones might work, and if somebody can point me in the direction of something that works it’ll save me a load of trial and error with Amazon.

Cheers

Gareth