Ranger Rick had his own molds and cast his own, and lubed them with Carnauba Red. His first webpage was on my site.
When he went out of business, he put many of the molds up for auction and I ended up with several of them, but we had a fire in our shop several years ago and most of my 100+ molds were destroyed in the fire.
Matt's Bullets is casting a pretty good selection of Big Bullets.