1969 Barracuda AC operation

There are companies who specialize in rebuilding, from previous threads, instrument specialist.

Here is one from a Google search, https://www.precision-pwr.com/
Don't know any thing about them

You could try yourself by drilling out the rivets, (that's the hardest part) a Dremel and slow and caution.

Once they are out you can see what is not right. If need, find another switch that is like yours, might not need to be the same exact one and swap some parts around.