Help to reduce door lock hole size 54mm to 32mm

Hi
I have just bough a replacement lock for my front door , presuming they are all the same size 54mm hole , however the new one only needs a 32mm hole , and the cover plate that comes with the new lock is only 55m diameter . So I need to replace the hole size from 54mm to 32mm .
any recommendations -
are there any adaptor plates around I had a Google but didn't find much
make a 54mm wooden plug, glue in then redrill at 32mm ? (But I am concerned this would not be strong enough is someone put a shoulder against door )
Larger cover plate ? .
make a stainless steel plate to cover hole with 32mm hole in middle .

how does most people fix this solution without buying a new door ?
Thanks


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