Below is a photo of the new jumbo joe compared with the European Compact Weber 47cm (18inch) kettle. It appears to be the same bowl and lid. If any of our international Brethren have this grill. They can probably confirm or deny that it will fit the middle section of an 18"wsm or 30 gallon drum. It all depends on the bowl and lid lips.
Side note: Target deleted the ad for the jumbo joe, Weber is on to us.