Weber actually introduced a 14.5" WSM in 1981, there is a great article on the history of the WSM at the bullet site. I'm sure Weber will sell a ton of them!
I don't envision one on my deck anytime soon, because my Cajun Bandit Mini fits the bill much better than a small bullet.
I haven't gone the tamale pot route, and don't get all the diffuser mods etc. Because I found this cool steel vacuum canister!
I've used it with the old style SJ with 3 daisy vents JSJ and SJG vents and never had any major issues as long as the intake vents were clear.
I settled on a UDS intake and never looked back.
Even made a rotisserie ring for them!
Go Weber- C'mon Cajun Bandit!!