I have a $15 DAC for sale on EBay that might work. I can send it over in a bubble envelope for you to try and you can throw it away if it doesnt work. Definitely meets your space requirements...
niner: its always useful to learn to read a schematic. Sometimes there are things on a schematic that aren't translated to PCB artwork that are useful to know. You need to remove two capacitors on your T2 build, check the schematic for more info.
This. Having run plenty of cross-compiled operating systems it is never a good idea and was more headaches than it was worth. It should be said that these hardware platforms are all no longer being made, but still.