This is one of those effects that still continues to sell out. And since it came out almost a year ago, that says a LOT about how good it is. Unfortunately, at the time of this writing, no more are available. I don't know if only a limited amount were made, or if they are working on a TKO 2.0 version, but they're completely off the market for the time being.
If I hear any other news on their availability, I will be sure to post something about it here!