@gsuberland I only thought about it for a minute, but why does it need an SCR? Could that FET be driven by the drain that's connected to the SCR gate? Could the series FET that carries 2.4A be some FET with a low V[Th] and R[DS,on], so getting its gate near 0 doesn't matter?
It's cool you get to work on a nice power circuit like this.