You need to use a real font. You can't fake it.
And if you're going to be doing EPUBs I highly recommend you look to move to Creative Cloud. EPUB is where the biggest advancements have been made.
I value that suggestion and will do that, but have to finish this first project before I can. I find that rules above footnotes, and lots of character style formatting is not exporting. Is there no hope in CS6?
Not without cracking open the EPUB and doing some HTML/CSS surgery.
Download the CC2015 trial and see what you get.