question about 71-72 factory duel exhaust hangars

[Ozark Tim]

A. Did G.M. produce hangar supports that serve a pass. side head and tail pipe for 71-72?
B. If not did they make them for odd applications like blazers or cab-chassis that had to route the exhaust on the pass side?

I am simply trying to make a 72 C-10 truck look like it has factory duel's and not sure if the iron supports that mount to the frame for the above mentioned, head and tail pipe are pieces that can be obtained.
The piercing holes are in the chassis so my hope is that yes they did, but finding them, oh boy! That might be fun....