I been looking at the motorized rotisserie style churrasco (Brazilian) attachments such as the Spinnari and Carson Rodizio, which seem really cool, but cost in the $300-$500 range. I've also seen a several non-rotisserie attachments for the Weber, but these were also very expensive for really just thin metal cut-outs and some skewers. So, I purchased some 24" skewers and made my own tri-level churrasco rack. It cost me less than $20 and is made from 3/4" aluminum angle - about $7 for a 6-foot section from Lowes. Hacksawed and drilled as necessary. Notched the bottom to fit on the Weber so it would stay put.
I'm gonna give this a try soon, but wanted to share in case others are out there wanting to do some Brazilian style BBQ.
With the skewers on each level: