www.car-part.com is another good resource. I've found that when you do find these engines listed, usually with a phone call you'll find out they have more and can get a better price. LKQ near me sells them with lower miles (07+) starting at $1200. Their pricing should be pretty standardized from Arkansas to Texas...
If you're looking to retrofit into an older truck though, go for one with a few more miles and maybe older.