This project is to use MOSFET and JFET amps. It works so well in sim I will have to assemble one. First the circuit.
Time for a build.
You could use 2N7002 and any general purpose JFET. The 2N7002 should be a direct sub for the MOSFET. Might need a larger source resistor with a different JFET. If R11 is 5K or 10K it should work with any JFET.
I used a 2KOhm pot for my build.