It seems I had bought the last of the caps from Cabelas.
I used to buy a pound of powder and a few tins at a time, but have since bought online, which means I must order a larger quantity to make the hazmat fee/shipping worthwhile.
I've recently bought from Graf's, which has fair prices, but if you'll be buying 5 pounds or more at a time you should look at Powder Inc.
My projectiles I ordered from a fellow on another forum who casts, but he's recently quit selling to the public. He said he would still sell to me, but he hasn't returned a PM from a week ago... Now I'm looking for someone who casts for a reasonable price (he sold .457" RB's for $7/100!), but also looking into casting for myself. Buying Lee casting stuff is cheap, and it doesn't seem like it would take long to recoup the cost.
I make my own felt wads and bullet/patch lube. A couple of punches from a fellow in Ohio (retired machinist), felt from Durofelt, and the ingredients to make Gatofeo's #1 lube, as well as pillow ticking to make patches.
I've also bought from Dixie Gun Works and Track of The Wolf.