Glock 9x19 pistols have been factory chambered in 9x21 for the Italian andYour Glock is chambered in 9x19mm. I'd suggest sticking with the ammo that the pistol was designed to fire, especially because it's a Glock. Glocks tend to become bombs when exposed to anything over their SAAMI speced chamber pressures.
OK--now I'm confused. According to the link that YOU provided, the 9mmYou might want to use this link to find a dealer near you:
Maybe they would buy a case and sell you a box.
I also did the math:
The head spacing could be an issue, as the case is .006 is shorter than the 9x19.
The OAL is .069 longer than the 9x19. edit: My reloading data shows 9x19 OAL ranging from 1.010" to 1.120".
I'm going to the local gun shop & see what they think.