Are you talking about a kettle or WSM?
I've seen brethren use the bottom section of a kettle for the lid for a UDS. Makes for a TALL lid! I always wanted to do it.
18.5", 22.5" OTS
Large BGE (chambersuac's)
The Fiery Furnace (chambersuac's)
Big JT's Smokin' BBQ Competition Team