It was on the boat when we bought it 13 years ago and it was not new
then, probably at least 5 to 10 years old already. I'd replace it but
it's a custom fit built-in.
Well shoot, you've got all us researchers here, what are the needed dimensions?
I have somewhat the same problem with the one I have. It is in a hole
in a cabinet and more "square" than most of the new ones.
If it breaks I will probably end up reconfiguring the cabinet.
Tiki bar builders can do stuff like that ;-)