I have a weldable steel exit window torque tube from the aircraft I work on that's the perfect diameter and thickness for this. Part was damaged at the linkage end not repairable. About the same wall thickness as these brackets I removed
"You mean to tell me you built a plane out of a Barracuda? I thought you were joking when you said your car(s) we're gonna fly and when they hit 88 MPH, you're gonna see some serious lift!"