Aaashi, u can buy them from any craft stores. My lil sis bought some for her project last week from stationary box i think. There's other stores u could try like boyes, whsmiths or any other local craft stores.
You can get them in Hobbycraft for literally pennies.
Failing that, buy some feather boas from a fabric shop and dissassemble them. Usually the feathers will pull right out if you loosen the glue with a hairdryer first.
Aashi wher are you from? you can definately buy them from hobbie craft, or any sewing shop..even John Lewis do them. Obviously they are going to be slightly more expensive from 'Confetti'...
Yes you probably can get them from Karachi, but honestly I wouldn't bother... look around you will find them at a sewing shop.