I recently bought the revolver cartridge box from C&C Sutler. It's a nice little box that can hold quite a few of the wax paper-wrapped cartridge packets from Buffalo Arms. However I also bought Cap and Ball's cartridge former, which came with two of the Colt-style hinged wooden boxes. I like these because they hold the cartridges nice and secure, and offer a bit more support and protection so the envelope doesn't accidentally burst while rattling around. Unfortunately, I can only fit one of those in the belt pouch if I expect to be able to close it again.
The pouch didn't come with a wooden block for holding cartridges, which my understanding was part of the originals. I tried to do a quick search to see if anyone makes the block insert as a separate purchase, but most of what I come up with is vintage boxes that already have their blocks. I THINK the box is big enough that if the block is set up properly (offset rows) it should be able to hold twelve rounds. Is there anyone that makes standalone blocks for these pouches, or would I have to do it myself?