Sorry to post on an ancient thread, but the Coop is definitely worth trying if you're in the 'hood. We order from there all the time. It's a tiny place but they will deliver (plan and order ahead, just in case they're swamped). You can pick up a slice to try it. Very reasonably priced. XL cheese is $14 I believe. And the owners are really nice people.
(I have zero to do with this business but it's close to my home and my office and we have been ordering from them for a decade now. I just happen to come across this thread looking for other resources in LA.)