985
Multiple Tesla vehicles were set on fire in Las Vegas and Kansas City
(www.theverge.com)
This is a most excellent place for technology news and articles.
Tesla has much higher output than the number of vehicles that spontaneously combust. So the supply shortage you envision won't occur unless cars light up by the hundreds or thousands a day. And that's before accounting for all the extra slack in production created by decreasing demand around the world.
Teslas combusting damages the brand. It's a material risk of owning a Tesla. It would also mean higher insurance. In fact beyond some combustion threshold, Teslas would become uninsurable. Therefore Teslas on fire directly contributes to decreasing Elon's purchase power.