Interesting to note that Weber killed two birds with one stone when they show the lime 22 ( new for '74) and the "Chariot Style" Seville cart (also changed in '74.
Now I'm torn between a Keylime Chariot or a Cado '67 style cart..
To Marty's point, all you need is an standard MBH 22 and an empty chariot and the sky's the limit.