I thought I'd open this up one last time before I plunge. I haven't seen any similar items online on the usual aftermarket supply places, which seems odd given the utility of the 1/2 Direct 1/2 Indirect approach
I also am just learning with the adjustable rig. I didn't buy the half's yet..
Kamado Joe makes a similar rig as well it should fit in the green eggs as well.
Tasty Licks also has gear that will work http://www.fredsmusicandbbq.com/
I need to get something like this. I got the half moon griddle thinking I could use it for indirect, but it turns out that thing gets really hot. I guess that's why they call it a griddle...