I'd like to start saying Tikkun Chatzot, but I don't think it exists in any of the siddurim I have (Tefilas Shlomo, Schottenstein Ed. Interlinear, Complete Artscroll Siddur). Does Artscroll offer a Tikkun Chatzot?
You probably want The Sweetest Hour; it's a Breslov publication. They claim it's the first English translation of Tikun Chatzot.
No, I don't think so. Are you looking for an English translation, commentary, what are you looking for?
No, ArtScroll has not yet published a Tikkun Chatzot at all, not even in Hebrew (the text is not found in any of their siddurim). To my knowledge, there is no plans to do so either.
The Breslov Siddur, translated by Rabbi Avraham Sutton and Chaim Kramer, indeed has an English/Hebrew Tikkun Chatzot in the back. The entire siddur is an amazing gem in itself anyways, even for people who are not Breslov.