Saigon, as the rest of Vietnam, is a great place to buy silver clothes at bargain prices. It won't be difficult for you to find a silk shop. Some of the clothes on sale in these shops are traditional vietnamese dresses (like the ones in the picture), but you can also get western clothes. In some shops they will do a taylor suit in a couple of days.
As I said somewhere else in this web site, bring an empty bag when visiting Vietnam. It will be difficult finding a place that matches Vietnamese prices and quality when it comes to clothes. By the way, if you plan to visit Hoi An, you should buy your clothes there.
♥ Visit Tagulandang Island ♥