It looks like you can buy a 6lb. 11oz can for $5.75 on ElegentFoods.net along with the paste & puree versions.
I do not know what they would charge for shipping.
*Update* Looks like UPS ground to TX is $13.74.
$20 for almost 7lbs. of sauce. If you could portion it out, freeze it and still have it turn out the way you like it, it might be worth it.
Unless, of course, you want to make enough pizzas to use it up right away!