Baa Baa Black sheep where are you? I really would like about 4 stacks Or black dye would be great also! Please contact me on smp7 or here on the forums
An even better idea if you are patient: Get some (at least two) black sheep (you can dye white sheep wih an ink sac) Breed them like mad Shear 'em all over and over (make sure they are in a grassy area) until you have enough. Saves lots of rupees, but not necessarily time.