Originally Posted by Grain Belt
Harbormaster is correct. The orginal Smokey Joe Platinum (also once known as a Jumbo Joe) was made until about 2007 or so. It has an 18 inch grate that is not interchangeable with the 18 1/2. It was set up like a larger version of today's Smokey Joe Gold (14 1/2). It has side vents like BBQChef33's picture shows.
Yes, I have one, and I had to order a grate from Weber for it. They still had them, as of a couple months ago. I don't know if they still make the grates, or if they are just selling what they have in stock till it is gone.
The new "Jumbo Joe," as it is now labeled, is uses a standard 18.5 inch grate.