Available as an assembled Module and as a DIY project.
This Module is currently available.
Special Delay
From Etsy:
BOM: https://docs.google.com/spreadsheets/d/1g95cMBVgF5-uGuX8HMcmjFDZoAH23e4b0BbD8XLR7xI/edit?usp=sharing
DIY PCB Ripple is an analog delay board with some really cool surprise effects.
https://www.etsy.com/listing/569268906/ripple-special-delay?ref=shop_home_active_3