Nice going! And a new tool to boot, you're in great shape!
Yes, hen's teeth is what they're made of. Was great for a couple of years when we could get them new still. Not sure if someone found a lot of old stock, or if they were actually making them. But either way the joy did not last long. They started running out of one style, then the next, then nothing since. Leaves a big void that someone needs to fill.
Unfortunately (or fortunately!) it's not that common an occurence, so probably not enough profit to keep someone in business for the long haul.
Paul