Very difficult to find those in HK--I ended up buying mine from someone selling theirs on AsiaExpat--very big, nice pine box perfect for toys--much better than anything else I found and quite cheap--I think it was like $200 HKD or something.
what about a junk shop in Fa Yuen Street at Prince Edward? I was given a wooden toy box from there and i did see some there but u have to dig deep and look around.
have you thought about using wooden wine crates? i use these for my kid's toys and books and they do the job. i also got them free from our neighborhood wine merchant. good luck!
oh and the best thing about the wine crates is their size allows us to slide them right underneath the sofa. so we can have our living room back at the end of the day.