Recommendation for 500V boost/flyback converter/controller to replace the converter portion of DRV2700.

Hello, we are currently using the DRV2700 Piezo Driver Evaluation Module to generate voltages up to 500V for testing devices that behave similar to piezo actuators.  With the DRV2700EVM-HV500 evaluation module, a large portion of the functionality is not needed.  I'm asking if you could please recommend a replacement converter/controller IC to mostly duplicate the boost flyback converter functionality of the DRV2700 with 3.0 to 5.0 volt input and up to 500V output.  We would prefer to use the same ATB322515 transformer, or similar (1:10 turns ratio, 7uH inductance) due to the small size, the max output power would only need to be a few watts.  Also, either TSSOP, SSOP, SC70, or other smaller leaded packages would be preferred to balance small size with the ease of soldering a package with leads.  Thank you in advance for any information.