everyone from natchez and midway to cabellas, and most of the local relaoding suppliers. They come with a mandrel that will size to .002" or so, but you can order one that goes to .003" for $5, and and other dimension you want for $10. I usually order 2 when I get a new caliber... for the 308 cases, the standard mandrel is .3055, so I order .3045, and .3035... all the mandrels for less than one bushing from hornady, rcbs, or anybody else, and the die is just under half the price of any of the bushing dies. Mandrels are avalable directly from LEE. Alone Teamed with a redding body die, its easy to turn out very low TIR ammo.