This is def not related to FF (well except maybe for miles earned w/ the CC) but I can normally rely on you guys for good advice

so here goes ...
I'm going to be in SIN and the surrounding countries for about 6 weeks starting from next week. normally i would go from India so it wouldnt be a big deal but this time im leaving from the States and as such I'll need to have a decent sized wardrobe of "appropriate for the weather" clothes.
so my question is - can someone recommend a good shop / shops where I can buy ready to wear business casual type of clothing in SIN.
well any help would be appreciated. TIA