If you are willing to burn your own CDs (or you have an mp3 player), I can recommend some podcast horror fiction that might fill the bill (and they have the advantage of being free):
"Infection" and "Ancestor" by Scott Sigler
"Pseudopod" (an audio short story horror magazine)
And, humbly, "Come, Let Me Whisper" by yours truly.
Hope these help with the trip!