A white pot in a smoker ?!?
I'd probably take it back too.
Run, don't walk, to your nearest thrift store and pick up a used Crockpot, the kind with removable pot. Sometimes you can find just the insert. You may have to keep going back until you can get ahold of one.
Garage sales and especially estate sales are also great places to look. Meanwhile, Promise the Missus you'll be careful with hers and Please loan it back until you come up with one for the smoker.