I just remembered that I made a layout for this a while ago + a slightly modified version and one with a BMP tone-stack.
I have not built and verified any of them yet, but I might as well post them in case someone wants to give it a go. I will be building these soon as well...
The v.2 of the Germanium layout has some strange pot values, so I wrote down some resistors that you can add to the pot in order to get the values correct. Be aware that this also has an effect on the taper response.
Personally I will try the closest value and see If that works out instead of the odd values.
First a my compact version of the one above:
A modified version:
And the silicon version with BMP tone-stack: