Instead of "Holly Jolly Christmas" and "Feliz Navidad" over and over, how about 12 (or 24, or 48 if you want to repeat) hours of classic Christmas shows from radio's past?http://christmasontheradio.com/
"Christmas On The Radio with Wyatt Cox" can be broken up into hour-long stand-alone segments or run for as short or as long a period as you like. Wyatt isn't a "big radio voice" guy, but his passion for the programs really shines through and makes his comments about the performers the real "icing on the cake."
The show is available on a barter basis (which, at last check, was strictly PSAs), provides 11 minutes an hour for local avails (or news and a Christmas song, however you'd like to do it), and is market-exclusive.
I highly recommend it!