Quoted from zahner:There were two made. The Mod Couple one is sold out, but not the interactive model. The interactive one is still available at:
https://pinside.com/pinball/market/shops/1070-hookedonpinballcom/02152-houdini-chinese-water-torture-mod-factory-interactive-
This is the one that I have. Really nice looking and lights up too. My wife gets a kick out of his little feet sticking out of the top. The installation was pretty straightforward as best I can recall.