While these switches can be found at a lot of places online and at the parts store, his site carries them as well. I only wanted to mention his site since he carries brand new Bezels as well. Can't speak for the switch quality, but the Black Bezels I got from him were very nice.
It's a pretty common problem with the chrome plastic buttons or toggles, they will split apart. You can just swap on a replacement from another switch pod. I keep a few on hand just for this reason or grab a handful when I'm at the yards. The little white buttons of the switch itself are most likely fine.
The one for the driver front window stands a little taller than the other 3. I think so you can find that 1 a little better in the dark. However, the shorter buttons will work there as well. They'll just all sit at the same height then.
I went back to a SS3600 this past weekend so the SS4000 is for sale. Less than 3500 miles on it and maybe 50 passes. I believe it has been sent back to Dave at Yank at least once to be cut and cleaned. $400....
I have the following items off the recently junked 96 Caprice if anyone has any interest in any of them.
Left and Right exhaust manifolds ($40 each)
AC Compressor ($80)
Accessory bracket ($140)
LT4 Starter ($60)
Mechanical Fan setup (whole setup $180)
(Fan, Belt, Bracket, Crank, fan and...