After a lot of time, I've found the coils, so I've built it. It works from the first time. The only problem is, as Willard said, that the 500 mH coil is huge and I soldered it diagonally.
Now I try to find the right schematic. It seems that it has some mistakes on the coil values. Anyway, I like it very much as it is now.
I know this is an old thread but I'm hoping that you might be able to let me know where you were able to source the inductors for this project. I've been able to locate other values from Mouser that I used for the deadend FX Terrahawk pedal but I really want to give this version of the circuit a shot.