The synthesis outlined in the paper takes about 90 hours, but basically all of it is just waiting for the material to bake in a furnace.

I'd expect some lab out there to report a result by the end of the week. The synthesis really is super simple, just grinding powders together and baking in a furnace. Granted, the final product has to be baked under vacuum, but that's not super difficult to achieve. The authors sealed the material in a quartz tube and baked in a standard furnace.