Just like I thought it's on Disc 5 of the BCI release.
From http://www.tvshowsondvd.com/news/Dungeons-Dragons/6453
"Radio show style presentation of unaired episode "Requiem" featuring select original cast members"
IIRC, this includes the actress for Sheila doing Bobby and maybe Uni. The rest of the voice actors vary in quality.
Apparently, US company BCI was shut down and Mill Creek now has the rights. Mill Creek's version doesn't not have any extras.