THIS IS NOT MY WORK. Thank the developer in the link I will provide. This is meant for the Nexus 7, however, it works on the Infinity as well. I believe you need an AOSP ROM to get this to work but you can flash on other Roms if you are willing to take the risk. I for one love the Ubuntu font and in just had to have it. Enjoy.
You need an AOSP ROM and CWR or TWRP Recovery. Don't forget to wipe Cache/Dalvik before flashing! I'm not responsible for anything that happens to your tablet, yadda yadda yadda.
PA3+ Transformer Infinity