I recently purchased the Firefly blueprints/ plans on eBay. This includes the introduction of the Firefly series (of ships) by the CEO of the Firefly Division of Blue Sun, layouts for the Firefly 03 series , using Serenity as the base.
There are five crew bunks. Mal's cabin is smaller than Wash & Zoe's. There are at least two shower rooms. Kaylee's bunk is next to Mal's. There is one empty bunk. Simon and River have separate staterooms. There are several airlocks. In addition to the shuttles, there are at least two escape pods. There's also a whole bunch of mechanical stuff that would be useful to fanfic writers.
And two short stories, one told as dialogue on a sort of Cortex "Shadetree Mechanic" program and one as a junkyard logbook. Both amusing.
The book is 'canon' btw, being authorized by Universal Studios.
There is soooo much Firefly-related goodness right now. In the last 13 years or so, there's never been a better time to be a Browncoat. So much sway, official merchandise and yes - canon friendly narrative. I mean, there's been 3 main comic series already, 4 one-shots tales and 'No Power In The Verse' coming in a month or two. Woop Woop!
Plus, if you have trouble finding Joss's script to read for the unaired 15th episode (Dead or Alive) or any of the behind the scenes stuff and gubbins from the Fox era in 2002/2003 - let me know and I can send them to ya.