I notice there is a $category variable available; would it be possible to also
have $categoryalias and $categorylink (or similar)?

At the moment I have changed line 376 in Cataloger.module.php to Alias() instead
of Name(), then assigned that to a variable called $categoryalias in the
template; but of course, I have to make sure I change this when I upgrade to a
later version.

If they could be included in the module, that would be great.