Using @font-face with ABCPDF? Or other way of getting fonts into PDF?

We have a large application successfully using ABCPDF.NET with HTML Styled text. We’re accustomed to adding text using fonts not installed in Windows, but stored in files elsewhere in the filesystem — we do this so each user can upload their own fonts and use them with the output. We use the AddFont call to embed the font in the Doc, then reference the font in a tag for HTML Styled text with the AddText call.