Here you can buy audiowerkstatt products:
audiowerkstatt.de (https://www.audiowerkstatt.de/en/productlist)
schneidersladen.de (https://www.schneidersladen.de/en/manufacturer/audiowerkstatt.html)
tubbutec.de (https://tubbutec.de/product-category/audiowerkstatt)
exploding-shed.com (https://www.exploding-shed.com/non-diy-units/audiowerkstatt-midi-tools)
justmusic.de (https://www.justmusic.de/Article?s=AUDIOWERKSTATT)