I just came across a chinese site of sblivefan on which a 13.9Mbyte download is offered which seems to include the latest Audigy beta drivers. I assume that these are time limited as were the first beta drivers to leak. Unfortunately not much is known about the latest changes because the site is kinda unclear in terms of design...

Anyway if some of you want to give it a try do it here: sblivefan Direct download | Download manager recommended.