A lot of the CMP adventures for the Missions line have never been officially released in any format (We've done like 70+ CMP adventures counting this years releases, and I think 20 or so have been published). Because they're intended solely for convention and CDT use, some of them never got past a "rough draft" format due to scheduling and trying to get them done in time for Origins and Gen Con. This was especially true with Dragon's Song, unfortunately, which was my project, and kinda hit about the time my health and personal issues began to start effecting my Missions work. Ray Rigel and Tim Patrick helped pick up some of my slack, but the two missions I worked on (the first and last of the four) were... very rough and we just never had an opportunity to go back and clean them up.
I didn't have the word count to do too much with Peri in NAS and wanted to give a very different perspective on him anyway. But at some point, I should see about getting a full summary of events for the Dragon's Song adventures, at least.