I know PST used to make a one piece driveshaft for our cars. Has anyone picked up the torch since they stopped? I am in the process of building a pair of hillclimb/track cars, and one of them the DS is starting to go, so, I was going to replace it, but, found that the one piece CF units don't seem to exist any more. Before I head to my local shop to see if they can help, I wanted to see if anyone knew anything. thanks.

EDIT: I'll add that both cars have rear sub frames that solid mount, and the motor has torque solutions sides and rear and a solid front.

 

Probably not. One piece driveshafts are a pretty bad idea on a racing car. The critical speed is much lower on a single piece shaft (especially when it's long like on an evo) so they're much more prone to come apart from centrifugal force than multipiece units.