My Dad had a '63 Chevy truck. One end of the anti-roll bar broke loose on the Alaska highway - we were miles from anywhere. Dad took one of the muffler clamps off and used it to hold the bar in place. That rusty old clamp didn't last long, but it was enough to get us to a place where we could buy a new one.
There is a lot of force on an anti-roll bar.
I’d be interested to know where the anti-sway bar came loose. The anti-sway bar that I have installed is from a square body truck. It is not common for them to fail. Obviously the brackets and bushings must be kept in good shape and properly lubricated.