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UC1823A: newer alternatives

Part Number: UC1823A

Hello - I am reviewing an old motor control design which we may have an opportunity to update. The power supply currently uses an UC1823A PWM controller and UC1708 dual FET driver. Must meet -55 to 125C military temp range. Is there anything newer/improved that I should consider?  Thank you 

Input Voltage: 16.8 to 32VDC (28V nominal)

Output Voltage: 260 VDC

Output Current: 2A (guesstimate)

Input Current @ full load (16.8V):  21A

Input Current @ full load (28V): 19.6A

Operating Temp Range: -55 to 125C