which countries in Asia would be the best and easiest to have my current PPL fully converted.
The country where you plan to fly in!
BTW, what you described with the Thai authorities sounds like a license validation; not conversion. A conversion usually involves sitting at least Air Law and a flight test with the local authority's examiner of airmen (and airwomen for political correctness).
So, why do you wish to convert from the Philippines PPL? Anything wrong with it?
