Any idea where can I get Merries diaper in bulk at cheaper rate?

One of my friends buys through this website: http://luvbabies.kimsang.com.sg/150-kao-merries Otherwise, she will wait for babyfairs. Currently, Sheng Siong is having Baby Fair offers till 30 Mar 2016. http://singpromos.com/babies-mothers/sheng-siong-baby-fair-offers-10-30-mar-2016-174156/