You can get it in Manila airport at around $50.- per small bucket (a bit more bigger than Haagan daz family size), the best flavour is Ube, then you may try mango flavour. They will pack then in dry ice for you, the price is included the dry ice service.
I would suggest to buy Ube and Mango, cuz it's the most delicious.
They have a counter at the airport to buy these ice creams. The good thing to buy at airport is they will packed it with dry ice, so it kepts cold after arrived in HK.
I have relatives in Philippines and i ask them to buy everytime they come to HK, cuz it's so yummy.