There is just so much out there for the Weber 22-1/2"kettles. Along with the Fire Butler and the Vortex, you have the Slow 'N Sear and the Blumoker SS Holder. You also have the Smokenator 1000 and the Changon Grillaque.
As for the griddles, again there is a ton of stuff out there for that fine kettle. Weber over the years has made several cast iron griddles for the kettles. Oval, half round, square, rectangular, and more. Onlyfire has a SS half round griddle as well as the Slow 'N Sear unit. If you really want the best, the biggest, baddest, and the most useful, check into the Mo-Jo Griddle. Will work on the 22-1/2 kettle. the 26" kettle, the Weber Ranch Kettle, your backyard fire pit, your wiener roast brush fire, and many others.
Gotta love the Weber Kettles.