If you can't find it it's pretty easy to make from bottled pomegranate juice, sugar, and lemon juice. I don't know if external links are allowed here but a little bit of web searching will turn up a recipe or ten.
This is a little tardy, but any middle eastern grocery in town (there are at least a couple)will have pomegranate molasses. it's a staple. Chong's might even have it - they have historically sold some middle eastern food.