The original chip was built with 1970s NMOS semiconductor technology. While you can theoretically build the same analog circuitry using discrete N-channel MOSF

The original chip was built with 1970s NMOS semiconductor technology. While you can theoretically build the same analog circuitry using discrete N-channel MOSFETs, it will not capture the tone of the original. In particular the "operational amplifiers" used in the design were very simplistic things built out of just a handful of transistors and are very non-linear devices. It is possible to build a circuit that behaves similarly but it won't sound the same.