Said that, I can tell the story.
Some time ago I wanted to monitor some RSYSLOG internals with Zabbix. Since I couldn’t find anything that suit my needs I put something together, and now I am making it public in the hope that someone can find it useful.
The installation is really simple and takes advantage of the Zabbix auto-discovery rules to configure itself and produce nice graphs. I keep the install instructions in a github repository, so please check it out.