LM5164: Protection from Input Voltage if High Side MOSFET Fails

Hello,
We're considering using the LM5164 to support an 85Vin, 15Vout @ 1A.
After reading this post, it was mentioned that the LM5164 is not suitable for an isolated fly-buck topology.

• Would you have another creative way of protecting the output from Vin if the High Side MOSFET shorts?  
• Or other higher voltage flybuck devices that can support closer to 1A of output current?

Thank you very much, Keith