For finding parts, keep in mind a lot of cars used the same parts in some systems.
The way to check compatibility would be go to rockauto website and look up the part for your specific car. On the part number, you click it and it will give a list of other cars that interchange. Remember though that interchangeability implies the same engine.
With that knowledge, you could rummage the junk yards for parts. Maybe they have a 97 grand prix that uses the same whatever part.
So you are wanting to install a supercharger? I used to be on a w-body forum and from what I gathered, it is quite a procedure. You cannot really just “bolt on and go” because a lot of things are set up different from the PCM, emissions, fuel system, TRANSMISSION, etc…
I am sure you will investigate completely before deciding if this is something you want to get into. Costs could run into the $1,000’s (especially since it may need a stronger transmission)