Here's a guy who used a pro q stacker ( $58.00 shipped) flipped upside down with the older Jumbo ( aka Platinum). http://www.stifflerssurplus.com/p-5313-pro-q-bbq-proq-wsm-185-stacker-for-weber-smokey-mountain-new-in-box.aspx) They say it fits very snug in the bottom. Almost too tight. I picked up a Jumbo recently at a thrift store for $10.00. Been thinking about doing this too.