I meant to get this out earlier, but obviously that didn't happen. When a few of us met at the Weber Grill in Schaumberg for lunch, one of the tools I brought with me (be prepared) was a tape measure. Once we were sufficiently boozed up, we dragged the repro-original out the front door for a few pics and measurements. It's pretty simple really, so a drawing is not really needed. Really.
First off, the stand is NOT bolted to the kettle, gravity is the only thing holding things together.
Secondly, the bowl appears to be (and measures up to be) a standard 22.5 kettle, minus the leg sockets. As you can see from the pics, it's a three-wheeler.
The stand itself is made from 1" wide steel stock, probably 3/16" thick. (If I had been more prepared I would have brought a micrometer.)
The diameter of the horizontal ring is 18" (I think - pretty sure - I had a couple Hopslams remember)
The height to the top of the top horizontal stand ring is 24"
The height to the top of the lower horzontal stand ring is 12"
The feet at the end of each leg stick out by 1 1/2"
You're on your own with the lid. (Should have brought a profiling tool) It's shallower than today's lids. Same vent though. The one we played with is a DA = 2001.
When I go back I may get serious about measuring this thing up right. If we're lucky, maybe I can pry the details out of Weber, or get a look at a drawing. Either way, I might take a shot at a repro of my own this Summer. I know a metal guy. Don't hold your breath.
Marty