A centifical supercharger {and since you weren't specific I assume that is what you meant, and not a roots type supercharger} is like a belt driven turbo.
If you have some common sense then you can make a bracket to work with an existing bracket.
For example I have a blown Ford 540FE with a Procharger F1R cogged belt supercharger.
Well, NOBODY makes a supercharger for a FE series Ford {except for Shelby, who briefly contracted Vortec to made some kits for the now defunct Super Snake Eleanor Mustangs}.
The kit I bought was for a 351W so I had some 1/4 aluminum laying around so I just made my own setup. And to prove that I'm not BS's here it is........