I found the same Txroadkill mentions above.
In maybe 2020, there was a string of posts about a replacement (Rough Country Big Bore, 73-76 CJ, part 87316).
I installed it, turned the wheels, took it off, and sent it back - didn't even go for a drive. The stroke is (from what I remeber) at least 2" too short, severely limiting the steering radius (In right hand turns).
The way the mounts are on the Roxor, the piston would not go all the way into the damper body (bottom out) on left hand turns. In right hand turns, it would extend all the way before the wheel reached max turn.
I now have driven about 5000 road miles between 2 machines. The stock steering dampers are fine for what I use the machines.
If anyone does come across a steering damper that is a perfect fit, please share.