I can't help much, I'm afraid - there is one listed in the freestuff here (http://www.renderosity.com/mod/freestuff/index.php?user_id=20054), but the download link doesn't work. You could maybe try contacting the poster and ask for it?

(there are a few bluetooth earpieces about (eg http://www.artraiders.com/download_page.php?file_id=307) - but I guess that isn't quite the thing you're after...