Here are few 2-packs at jr.com

Ocean's Twelve/Perfect Storm (2005) $6.99
Three Kings/ U.S. Marshals DVD 2-Pack (1998/1998)
Eraser/ Long Kiss Good Night, The - DVD 2-Pack (1996/1996)
Set it Off / Fallen 2-Pack (1996/1998)
Exit Wounds/Under Siege (1992-2001)
From Dusk Till Dawn 3: The Hangman's Daughter (2000)
Blood Work/Mystic River
The Bodyguard/Laws of Attraction

there are a few more on the site... but only found one i liked, and shipping is $2.95 for the first item and $1 extra for each additional (i think)... so was better off at DDD