Sorry that this doesn't answer your question, but if your brother is ever in Singapore, just about ALL DVD players sold in the shops are region-free. Not sure about Malaysia and Hong Kong, but I'd suspect that they are the same.
There is a store in Akihabara across the street from the train station and up on the second floor (use an escalator) to the right. You will see a store called Sato Musen and you take the escalator up to the second floor. I think the store is called IT'S, but can't be sure. They sell all region NTSC Pioneers and other brands as well.