as already suggested on RC

i have found (i've actually been subscribed for 3 months now, but you get the idea) a whole channel of songs from the postnuke setting.
http://www.youtube.com/user/jazznbluesexperience?feature=g-all-u
as a few examples of the songs on here
http://www.youtube.com/watch?v=Lbc_ggMf2Uc&feature=player_profilepage
http://www.youtube.com/watch?v=uA0h6uzETL4&feature=plcp
just as a few.

really hope this radio gets added eventually

[EDIT]
P.S.
i don't think i've ever ever mentioned it to anyone else on here, but i can do trumpet covers of all of these songs if you think copyright strikes or whatever eldar mentioned will happen. i play the trumpet as an avid hobby, and have been since 2008 (5th grade)

Not sure if we will be able to add the radio idea before the release.

Also, might want to keep all suggestions on the PNRP forums, makes it less confusing that way

However, we do need to try and get more of the gmod community onto these forums.