HKS made a turbo kit for the 4AGZE which came with controllers to disengage the factory superchargers clutch once the turbo spooled up, and an AFC.
The supercharger though had to blow through the turbo's turbine side, then through the factory intercooler, throttle, etc.
I think BD4's fitted it up as a trial, but it cost about $10 to buy the complete kit.
Been toying with the idea of adding a supercharger to my turbo diesel, to give it some punch between 1400rpm and 2200rpm while the turbo is still spooling up. It stills takes a lot of gas to make 13psi.