In Australia, the vortex is not available sadly. I have been thinking about having one custom made.
However, I recently acquired a 14" WSM charcoal chamber and thought it would work as a suitable alternative.
Turns out that I was right
(http://i1314.photobucket.com/albums/t562/sttab77/20161029_185248_zpsl0dq6wpu.jpg) (http://s1314.photobucket.com/user/sttab77/media/20161029_185248_zpsl0dq6wpu.jpg.html)
(http://i1314.photobucket.com/albums/t562/sttab77/20161029_200653_zps9rf0yayw.jpg) (http://s1314.photobucket.com/user/sttab77/media/20161029_200653_zps9rf0yayw.jpg.html)
Chicken was delicious
+1 on using a WSM ring with the Gourmet grate! Grate minds think alike...
http://weberkettleclub.com/forums/weber-kettles-accessories/gourmet-grate-basket-too-late-for-mod-month/msg249782/#msg249782
4.5 Qt Stainless bowl from WM. Drill, Jigsaw, Dremel bottom. Works like a charm. Got awesome skin on the drumsticks I experimented with... I am sure Vortex is awesome, but this works too...