If you need some custom work Ramball is your guy. Couldn't find what I wanted so a few pm's, rough sketch on notebook paper and here you go. Good guy to deal with. I have a guy doing some landscape work in the backyard and he poured me a 36"x96" slab. Haven't quite decide if I'm going to use Oklahoma chopped rock or a bunch of leftover bricks I have but fixing to try my hand at masonry and build something similar to this. May put a thread in the diy section.
Can't wait to get it built, didn't think about it when he drew it up but it is definitely big enough to cook a whole pig.