There are some absolutely fabulous beauty shops in HK which sell many top name brands at a fraction of the UK cost, I'm sure you would find plenty of estee lauder there.
I remember I bought my favourite haircare product sebastian potion 9 for less than half the cost here. The name of the store I bought from is Sasa and they have branches all over HK they also have a website , so you could look before you go.

Thanks very much Shirley, I'll check that out.