decor stuff, I heard from my florist, can to check out tekka mall. She gets her stuff from there as well.
For cloths, go to chinatown. Arab street has the tendency to ketok people who are not regulars, dunno the market, or buy small quantity.
If you are looking for ribbons with custom printing (like your name), we stumbled across a shop at north bridge road selling ribbons and such and they do the printing on ribbons. Can't remember the shop name, but its along north bridge road. Near to frederick lee bridal.