have you thought about other non-maternity brands? when I was pregnant I discovered this Aussie brand of clothing called Metalicus, it's stretchy fabric (you can wear it when you are pregnant or breastfeeding - for breastfeeding esp choose the v-neck tops) and is versatile, modern, very easy to wear and care for (just cold handwash, no ironing required,one size fits all) and reasonably priced....here's the website for ordering and the great thing I like is they have very reasonable postage charges (A$20 for 6 tops)....
http://www.momsinmind.com.sg/
Check this website for some more options. It is a singapore based website. They have an online store and deliver to HK. I've not used them, wish I'd known about them when I was breastfeeding. If you do buy from them, give us a feedback
You can try the below for maternity/nursing clothing:
For a very comfortable every night and day at home bra: http://www.hk-bfmoms.com/
(Essential Bra and Leisure Bra - inexpesive and perfect for nursing)
The site is in Chinese, but has lots of English and you can call them.
Also international orders are easy at: http://www.figleaves.com
They have Elle MacPherson, nice lacey and comfy.
I ordered mine online at www.motherwear.com. They're a bit expensive and so I usually bought those which were on sale. Very good and fast service. The clothes were delivered in about a week (from the US). Once I found the style that I ordered didn't fit me well and so I sent it back and ordered another style. The shipping charge for the replacement item was waived (because I already paid for it the first time).