What is a good nursery source for conifers in the Mid Atlantic?
For big quantities of species conifers, Musser Forests. Around Indiana, PA there are several others, but I can't remember the names. Seems to me one was Blue Ridge, but nothing comes up with that name. They were located on the main drag just west of town. Musser's is all over the net.
If you are looking for hard to find cultivars, can't help you.