yes i know Remington produces it it and probably Federal and Winchester as well. Le Baron's sells it , and Hornady recently introduced a soft spitzer than will work in levers. I'm pretty sure the big mail order places (such asSIR, Russells, Wholesale, Epps) carry it as well.
It is loaded fairly mild (405 grains at around 1300- 1400 FPS if I recall)because of all the weak trapdoors out there, in a modern rifle you can load it up to much higher levels. There are a couple companies such as Garrett? that sell a much stronger load for use in Marlin 1895's, Ruger singleshots, etc