Original 602s can easily hit 400 a box now. I stocked up so long ago that I can finish out and don't need to buy anymore. They are different than the Palomino copies. Think of it as the difference between a 71 Hemi Cuda and some Cuda that has a Hemi stuffed in it by your Cousin.

Try the Musgrave Pencil Company. They happen to be in Tennessee and sell a pretty good pencil.

Go for the sample pack and the Unigraph (you can select your grade and tipped or untipped). If you want a close approximation to the original 602 choose a 6B.