Creating a custom version of the charent.cf file for your
doctype should allow you to map these characters to different glyphs,
such as something in a font like Symbol or Wingdings. Search the help
for "charent.cf" to find the details. I don't have access to the Epic
4.3 help file, at the moment, but in 5.2, it's covered in a topic called
"How character sets are supported".