I have been ordering lead through rotometals. Still cheaper than buying bullets.
Im using lee 6 cavity mold since there is no pounding to get the sprue plate off it is really fast. I can crank out a couple hundred bullets in just a few minutes.
Im also liking the lee alox lube since im not running real high speeds its working great. Small amount coats em when shaken in a plastic bucket then i spread em on wax paper like the instructions say and let dry overnite.
Im also using a lee sizing die to size them.
As far as a distributer for casting equipment its websearch and shopping