Pedal is available as a DIY project only.
This Pedal is currently available.
Big Muzz Pi Clone
An exact replica of the NYC era version of the legendary Big Muff Pi. Comes with 2N5088 transistors. Metal film resistors and metallized polyester film capacitors deliver spot on vintage tone, but with much much less noise than the original and only a fraction of the original size. Despite its small size, the Li'l Beaver uses all through-hole components and panel mounted hardware. True bypass.
https://buildyourownclone.com/collections/bassfx/products/lil-beaver-nyc-kit