According to the article:
The solution: switch to a small-primer pocket and utilize a small-rifle primer. Coelho reached out to Starline again, asking the company to make .45 Super brass with a small-primer pocket. That solved the primer-flow problem and Triton Cartridge soon began offering factory-loaded .450 SMC ammunition. It was loaded to a maximum average pressure (MAP) of 32,000 psi, which is slightly higher than .45 Super pressures, but still less than the 37,500 psi pressure of the 10 mm. The new name—.450 SMC—solved the trade-mark problem, and Triton had two loads: a 165-grain bullet at 1,450 fps and a 230-grain bullet at 1,150 fps.
Starline apparently making them under contract for Triton, with the small primer pockets so we could use small rifle primers to stop the primer flow problem.
The only source I could find was the Triton's web site and you would have to buy factory loads from them to get the cases.
http://www.45super.com/Triton quik-shok.html