I have not tried this.
But I have 250 Nighthawks and wonder what I'll do when all the used stock exhausts are gone.
Designing an exhaust system that leaves you with a rideable/reliable/fun bike takes lots of calculation.
There is much more to it than cut/weld/grind, repeat. And the odds of finding a complete system from a scrambler that'll bolt up are slim to none.
It'd be cheaper to start from scratch with a good design than to hack up good vintage parts from a bike with a faithful following.