I suppose you could use any 3v lithium cell that was close right. Is this a a logistics problem? Chances are if you have access to the internet you should find about everything, 2032 - very common size. You could find a calculator or led eychain, and rip one out. Anyways, I would direct you to try the battry engineering forum if you are looking for a permanent replacment type.
I buy them at the local drug store camera department! They are used in lots and lots of electronic systems. What is the problem of your not being able to find them? Did a wholesale supplier stop carrying them? If so, you may just need to go retail. Nobody has stopped making them for sure.
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CR2032 is alive and well in the UK - we use quite a few of them on a variety of items where they serve as memory backup batteries. Just typing [blue]cr2032[/blue] in to Google brought up a huge number of hits from retail and commercial suppliers.
