You can find them every now and then: the Antiochians in the USA are one example--though mostly they are converting Christians to Christianity (something I don't find terribly impressive). But there is also the Orthodox Church in Indonesia, whose senior priest is himself a former Muslim. (Who converted to evangelical Christianity and only later became Orthodox.) Here is their website, I recommend their newsletter which has some nice pictures. It makes me glad to see that there are places where Orthodoxy is still out planting churches and catechizing and evangelizing non-Christians.
Friends of Indonesia