There's nothing to work out. Basically, the package maintainer has to decide whether he wants to ship calibre-mount-helper or not. If he doesn't want to ship it, he should replace it with a script that does the same thing using whatever distro specific technique he likes.
calibre-mount-helper is 50 lines of C code, it should be trivial to replace. I am not going to write the replacement as the current calibre-mount-helper is the best cross distro way of doing mounting and I make it a policy to write as little context specific code as possible.