66 Special Radio Fit

Is the radio in a 1966 Buick Special/Skylark exclusive to that car or is there any other radio that will fit?
Would like to put an AM/FM radio in but don't want to break the bank doing it!
They use a standard knob and face layout for the period. Most any aftermarket radio will fit.

Here are some on Ebay.

Another option is there are people who will take your radio and change it into an AM/FM with inputs for devices.

I personally have an original am/fm and use a transmitter on my cell phone to listen to whatever I want.