Accessing couchbase as memcached

So here it says you can “Deploy a standalone Memcached to Couchbase Server proxy, called Moxi in the following cases” but I can’t find this anywhere. I would like to use this for a php based N-Tier app, that will share the session state across the front ends in memcached which is a supported php session sharing method.

Any pointers where I can find Moxi?

Thank you,