If you call down to one of the bigger boneyards in the Nevada, Arizona, or Utah deserts, they may be able to find one that isn't rusted up too badly. You could sandblast the exterior and paint it with some Eastwood high temp exhaust paint... but be aware that because of the valuable metals used inside them, it might be pricey... and there's no guarentee that it won't be plugged up... 'course there is a remedy for that.
