Harbinger supporter packs are now live and available for purchase. It might not look that great, but it’s a limited time offer and most of the players will probably pick one up. You can purchase it here: https://www.pathofexile.com/forum/view-thread/1963339
The most recent discussion about the Harbinger pack you can read up is on reddit, so head over to: https://www.reddit.com/r/pathofexile/comments/6ue8rj/the_harbinger_supporter_packs_are_now_available/
People seem to be fairly upset about the look of the looks, since it might not be the best work. Same goes for the rewards of the Harbinger league.