What's with pacsun's ad?

i received the new teen vogue (april 2009) today and the mail, and i came across a pacsun ad. i love pacsun and i shop there all the time. but in the ad, i found a sweatshirt that i really, REALLY liked. it's plain grey, and i have to have it. i know it sounds totally dumb, but i want it so bad! so i went on the pacsun website and guess what? they didn't have it. of course. so where can i get it if it's not online? is there not another website? i looked in clearance and the regular 'hoodie' category, but it wasn't there. it wasn't even in the guys section. i just don't understand why they put an ad in a magazine for this month wanting you to buy their clothes, when they don't even offer the ones in the ad. thanks :)