Larry,
I will likley be going to the SPARC museum on Sunday (February 7) and could take a photo or two of the Bluebird for you. My camera is 10M pixels – is that sufficient resolution for your needs? My recollection is that the one on display there has been fitted with a repalcement mirror (and I think it may have a small chip on it) but it looks very nice – you can see it here https://www.flickr.com/photos/colinbeadle/3456938467/. Have you taken a look at https://www.tuberadioland.com/spartonmain.html, https://www.antiqueradio.org/spar04.htm and https://www.tuberadioland.com/sparton566bluebird_main.html?
Gerry