It’s an open source font, so you have three options:

• If you know how to do it, add the accented letters yourself
• Commission the type designer (Friedrich Althausen) to add the letters for you
• Commission anybody who knows how to do it to add the letters for you

Hope this helps!

Quick & dirty edited Vollkorn:
(ttfautohint default settings)

I believe the original Vollkorn was hand-hinted by Yanone. But just adding some accented letters shouldn’t make it necessary to re-hint the font.

Commission anybody who knows how to do it to add the letters for you

If you go this route there are many people here who can do it for you, including yours truly*. You will need a -modest- budget however.

* hpapazian at gmail dot com

hhp

including yours truly*

Hrant, you shameless whore! So, how goes the "secret" project?