I've heard that APS is still being made by someone but I'm not sure by whom.

Can't you use the nice L lenses on 35mm SLRs instead? They work great on my EOS 650, 10S and 1N RS bodies. Those lenses will be usable for a long time at least, I expect, unless the mobile phone camera somehow kills the EOS system which I doubt (I think it will kill the digital Powershot lines first).