Who will likely sell Anusoft?
"Likely" is such a strong word. Don't expect this for a while yet, if ever; as far as I know Fen hasn't even looked at it yet, and he may decide to veto it if he doesn't like it.
It needs a vendor to sell it is all. Not sure where to put it at the moment. I was thinking Lerris could sell it after a certain point in game (like after unlocking a planet or reaching a certain level).