Is it hard to find 4-speed Demons? Or is it just my luck?

My 71 Demon bracket car was originally a 340/4 speed car. It has been a race car for 49 of it's 50 year existence. Unfortunately before I bought it, someone cut about 60% of the firewall & about 25 % of the transmission/driveshaft tunnel out, not to mention they torched off the left side motor mount stand. I had the firewall & tunnel replaced with aluminum & motor plated it to get it where it is today. The nice part about the aluminum tunnel is that we put Dzus fasteners in to be able to unbolt the transmission from the drivers compartment.
We are going to also put a tunnel in. The firewall has to stay due to rules for a radial tire class.