I called and seems you are right. I am still skeptical, but they say they can get 50s. They say they can order them but they have not used a 50 set up yet or recently. I was under the impression that Weber stoppped making these years ago.
Mine are still cheaper, you can see 'em, and they are proven. Three first place finishes, in fields of greater than 40 and 50 cars, in the last three events.
Doc'