For $25 look for a Mosky D250X. It has a switch for both DOD 250 and Distortion+ clipping configurations.
https://www.youtube.com/watch?v=hAA150TPsGU
I recently built an Electra but went in a different direction for the output stage. The Electra schematic is missing a resistor in series before the clipping diodes like the DOD 250 and Distortion Plus. Without it, there isn't enough juice to drive the clipping diodes. So, I added a second transistor stage instead to drive the diodes in a DOD 250 asymmetric clipping configuration. I used NOS Germanium transistors and diodes for a thick, creamy, warm overdrive sound.