I have no burning desire to get the the Weber system. I have plenty of cast iron to use on my grill, but no CI wok. However there are CI woks on Amazon for less. As for the grill insert, I have this instead:
I call that my magic grate. It was in our yard as part of a fire pit when we moved here in '87. When I got a used Silver A a couple years ago I found it fits well enough to use in that. The bars are about 3/4" top to bottom so there is a lot of mass there for great grill marks. The bars are spaced close enough so that small stuff tends not to fall through. (Who of us has not sacrificed a burger to the gods of fire on a wire grate.
The best thing about it is the perfect fit in a 22.5 Weber kettle. There's just enough space along the side to open the hinged part of the grate. And it will hold a lot more food than the circular Weber insert.