It is a tough set. At one point I knew a few other people working on the whole set. The Ryan and Henderson are tough because of player collectors, but not the hardest to find in all Blackless ( no gray ). The A sheet cards are the easiest. When I was building the set the theory was C sheet cards were toughest. But Bs can be pretty hard as well.
The Blackless cards were distributed in packs at retail. The As seem to have showed up in NY and the Bs and Cs in Micihigan. The main sellers I used were in those states. Good luck in your quest
