Here are some links to websites in the USA for online shopping.
There are often specials for mailing list customers, such as free shipping, 10-20% off days and free vouchers and patterns.
I regularly use the following shops and have only experienced excellent customer service and never a problem with delivery to Singapore.
Hancocks of Paducah http://www.hancocks-paducah.com/
Fat Quarter Shop http://www.fatquartershop.com/
If anyone has any others to share, please let me know.