For anyone curious, I have one of these 7.5" pistols with the 8.5" handguard, and I'm working with a company that makes custom muzzle brakes and suppressor mounts, and they said they could and would be willing to make one for me, that is slightly extended in length to be able to clear the factory handguard to allow me to run my Dead Air cans with KeyMo mounts, without any modifications, but installing the new extended length KeyMount brake.
Once I get mine made, and get permission to announce who it is that is making it (VERY renowned company), if it is a popularly requested item, it might become one of their stocking items, and they might make more of them. So, just posting this up for any SAINT VICTOR 7.5" pistol owners in the future, who are wanting to suppress their gun without having to replace the handguard, and modify anything, other than swapping out the muzzle device.
Also, incase anyone is curious, the Dead Air Sandman series and the Nomad-30 and Nomad-L do not have barrel length ratings for 5.56. The Sandman would be the heavier duty option with the solid stellite baffle stack that can handle full-auto SBR's in 5.56. The Nomad cans can also handle it, it's just recommended that you time your shots about a 1-2 seconds apart, and don't do any full-auto, binary, echo, or mag-dumps.