Greetings from the future,
Gateron has now released the Kangaroo Ink, which is a quality tactile like the Zealios or Holy Panda.
I have one in a switch tester. It's similar to the Zealios or Holy Panda, but with a few key differences: The tactile bump is snappier than the other two, and the travel distance is shorter, so it instantly bottoms out when you press it. The bottom out sound is loud like a Holy Panda, but deeper sounding because of the ink housing. The ink housing also gives it a smoother feel than either of the other two.
They're similarly expensive though, at about $0.90 per switch. If you're looking for a budget tactile this isn't your bet. But it definitely competes with the other tactiles, worth checking out!