Тут подробная статья о хлопке, по-английски, но там перечисляются районы и магазине в Каире, где торгуют длинноволокнистым хлопком.

http://www.touregypt.net/featurestories/cotton.htm

Вот этот кусочек:

in Mohanedseen, there is the Tayseer Mardini shop on Shehab street and Bon Marshe in Muhi El Deen ABu el Ezz Street, while there is also the Hawa shop in Lebanon square. In upscale Heliopolis, there is Salmeko on Ismailia square and Egypt Express in the Sheraton Building. In Zamalek, there is IMM in Ahmed Mazhar Street, and of course many others. A number of chain shops, such as Mobaco Cotton, can be found throughout the city selling Egyptian cotton clothing.