Hi I am looking for a modern sub for a SN72L022P 8 pin dip, or a place to get one. Is it an opamp ? Also same for a Darlington D16P1 TO92 transistor I have been using this old Maestro Fuzztain in my guitar synth set up for a long time now but it's gain is so low that it is now useless so it's time for a recapping and replacing bad semis.