Discus DSC2000.1D maxxsonics built

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I have one of these, one side of the output bridge is blown up. They are IRFP264N transistors. I cannot find these anywhere. Anything that will sub to them?

Also the driver IC is scratched out and I dunno what it is. U2 on the driver board. I wiped it a litle bit, the only part I can make out is the IR symbol. Cant make out a part number, its a 14 pin SOIC. My guess maybe the IR2110 series? not sure.

Any ideas?
 
Pictures. Not sure how thats gonna help becuase the chip number is gone.
 

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