Perhaps the simplest replacement for EPUBgrify would be a Sigil plugin that would only do two things:
1. replacement.
Find:
Code:
<span class="com-rorohiko-pagestaker-style">(\d+)</span>
Replace to:
Code:
<span epub:type="pagebreak" id="page\1" title="\1" />
2.creating a text file with the content (like EPUBgrify):
Code:
<li><a href="FILENAME.XHTML#\1">\1</a></li>
…
…
or and put that data right into the nav file.
In fact, the only problem is to put this file name in the text file, because there is no variable/placeholder in the "naked" Sigil that would allow you to insert the current file name in the "Replace" field. I do not complain about this lack, but this example only shows that such a need sometimes exists