Do you have a reference image of what you're trying to make? It could give a better idea of what you're trying to do. I know that there are feathered fabrics out there, there are also pads with pre-sewn feathers on them (Usually used for hats) that you could use as well, but if you're looking to do something more cartoony, then your options open up a lot more.
Good, Cheap, or Fast
Pick any two...
If its Good and Cheap, it wont be Fast
If its Fast and Cheap, it wont be Good
If its Fast and Good it wont be Cheap