Is there an easy way to change radio stations via some script function on a jukebox or something?

If not I plan on using a work-a-round involving a "tuner" and enabling/disabling various radios but I'd like the functionality of just doing it in one small script (plus it would be easier for adding mod support).

Hmm not sure. The only way I have every seen it done (like in house mods with a 'house radio system') is they place like 3 radios inside eachother, with a diff station on each, and if you swap them it enables/disables them. This still would be a rather small script depending on how many radios you have that need switching.

http://geck.gamesas.com/index.php/SetNPCRadio
This does require an NPC/talking activator.