If you click on the link you initially quoted, they are available and in stock, with the battery included, from Apple.
Most car remote uses them too, even recent car remotes.
Not really the sort of thing you want in a living room right?
I agree they are dangerous, kids and animals die after swallowing them, even when discharged.
Apple sell them here in NZ and supply them to stores too.
Apple Store Search Results
www.apple.com
There's speculation that Apple’s tracking device may also use a CR2032 too.
Like I said, double standard.