On Wednesday, April 13, 2011 at 21:15, steve shumaker wrote:
  from comparing your pic with the partsurfer diagram,
I'd call it:
 RB2-4827-000CN
 
http://partsurfer.hp.com/Search.aspx?searchText=c8049a 
The illustration appears plausible, though I was hoping that someone could
confirm from a physical part.
My only concern is that the description shown is "Duplexer cover - Covers
the duplexer on the back of the printer" ...but this printer has no
duplexer (it's an option).  The cover I need actually covers the end of the
paper tray.
Thanks for your help; I appreciate it.
                                      -- Dave