WebFinger library for PHP?

My goal is to retrieve the OpenID identity provider for a given e-mail address, and so I'm looking for a WebFinger library written in PHP. Unfortunately I fail to find a suitable one.

The lib should be PEAR-installable and be usable standalone, or at least with only a few dependencies.

Any recommendations?

What I've found so far:

• PSX Framework is a quite big framework that offers only one PEAR compatible package that contains everything. Webfinger, Yadis, Logging, Session etc - too much. Also no docblocks.
• find by email's webfinger.php is only a file with a bunch of functions that don't support OpenID discovery. No unit tests, not usable standalone.
• http://status.net/ has a Discovery class in lib/discovery.php that supports Webfinger. Not PEAR-installable, not standalone.
• https://github.com/walkah/discovery-php - standalone library. Not PEAR-installable, doesn't support the full spec (e.g. no HTTPS-first fetching)
• SocialIgniter's WebFinger implementation: https://github.com/socialigniter/socialigniter/blob/master/application/libraries/Webfinger.php - does not fetch HTTPS resources.

I've began implementing it myself since there doesn't seem to be a good existing libary

The XML_XRD PEAR package is an implementation of XRD, which gets me 80% to WebFinger support. See the code.

I also wrote the Net_WebFinger package.