hi,
There are "n" number of curtain shops depending on the range you want to buy from.
the more familiar one are curtains by rastogis near kasi arcade chellarams,raghurams all of them in t.nagar.
fabric sense on cathedral road is also very good ............slightly expensive.
MA.Jacob and kalpadruma on cathedral road.
you get a good variety of ready made curtains in fab india too.
still more....... sarvana stores also has quiet some .
hope u have a wonderful time decorating your home.
deepa