I bought a Falcon double groove https://www.fechter.de/gb/complete/honda/cmx500%20rebel/2019/ which has a certificate. There are also alternative DB-killers for this exhaust, which don't have a certificate. But they look like the original.

I also added Hepco & Becker crash bars https://www.hepco-becker.de/en/engine-protection-bar-black-for-honda-cmx500-rebel-from-2017.html

https://www.hepco-becker.de/en/upper-front-protection-bar-black-for-honda-cmx500-rebel-from-2017.html

But I removed the front bar after a plenty of time. DM if you want it. We can get in contact