Pedal is available as a DIY project only.
This Pedal is currently available.
Dallas Rangemaster Clone
The Range is a treblebooster based on the legendary Dallas Rangemaster. It has the same features but some addons. It works with a germanium PNP transistor and uses a toggle-switch to switch between different input capacitors which makes it more versatile. It also features negative ground, so you can use the power-supply you use for your ofter effects.
https://www.musikding.de/Der-Range-Germanium-Treblebooster-Bausatz
RD-Guitarworks Germanium Treble Booster