Need help with cadillac, got wet inside..

The principle problem with wet in a car is electrical. It needs to dry out, and that can take a long time and a lot of heat. And if needed parts are discontinued, they're likely available at a car parts store or at a salvage yard.

Yep a salvage yard is your only choice especially if it is interior pieces.

interior... if electrical, use contact cleaner for getting switches to work... good luck.