I've found some sites that list a disc 2 that has 20 tracks. For example:
http://www25.big.or.jp/~karune/cd/WATANABE-006.htm
http://www.cylist.com/List/406565568/
It seems like the voice collection track has been split into a track for each character or something. I can't find any scans or anything for such a version though, just some websites (I don't know if they're reliable sources or not). Does anyone know anything about a print that has 20 tracks for disc 2?