I've attached three .PDF files for the 19ft Bambi. They apply to my 2001 19ft Bambi, but I cannot say if they are applicable to your 2005 19ft Bambi.
915474, rev G (6/01), Chassis weldments.
915531, rev N (1/06), Chassis prep.
964465, rev H (3/06), Floor cut out.
Contact Jim Parrett at Airstream Customer Service if you want further information or drawings.
I modified my Bambi bed pedestal, freshwater and 120VAC wiring, and found that the drawings were helpful. I ended up transferring the drawings and actual measurements on my Bambi into autocad for planning the job prior to the modifications.
2001 19-ft Bambi
2013 Honda Ridgeline RTL