Winchester also is supposed to make them but I sure havent seen any lately. Theirs list for $41.00 a box -- others $35. and a bit lower last time I checked but good luck finding it. Might be better travling to out of state to find some.
I would say load your own, but with the way things are right now even that would be a challenge.
I do have a set of like new Lee dies I can spare but with things the way they are buying dies alone wont get you much.