This site might have what you need:
http://www.propellor.tv/C47%20instrument%20panel.html
The restorer claims that the panel and placards are WW2 vintage.
The instruments in the panel might not be 1942 vintage, but they're close enough. My understanding is that there were very few US manufacturers of cockpit instruments (Bendix, Sperry, General Electric, Honeywell, Delco, and a few others) and they all made instruments to USAAF or USN standards.
I'm not sure if you intend to model them, but here is a decent picture of the C-47 radio operator station:
http://www.jsu.edu/socialwork/fredfa...nside_C-47.jpg
Not so great picture of the navigator position:
http://www.jsu.edu/socialwork/fredfa...ide_C-47_2.jpg