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lm49810

Other Parts Discussed in Thread: OPA454

What is the new replacement for this? i am using it as a driver for lateral mosfets 8A with a VDS of 200V.  Supposedly i can use the OPA454 as a driver however it is capped at 100, Can i use the INA product to pump up the voltage on this and will it effect audio quality?  The Driver is to kick the voltage up and provide 50ma to the mosfet - Currently using all discrete my secondaries are running 55v, getting pumped to 78v then 4p and 4n lat mosfets for 500w at 4 ohms.  i was told about how the 49810 could make things easier and faster however its at the end of the lifecycle.  Can someone please assist with a opamp or cascade/cascode array to get better fidelity and minimize part count?