It sounds like they are mixing facts . . .
Yes, CZ is discontinuing the nitride-only version (blue grips). However, what that has to do with where they are being made (custom shop versus production) doesn't make any sense.
Also, depending on the size of this gun shop "their two biggest distributors" could be mediocre-sized places, or places that pander to the very-large stores. I'm a nothing-volume FFL dealer, and NONE of my six distributors have delivered any of the several Shadow 2s I've had on back-order all year Money and volume talk when it comes to the high-demand firearms.
Hell, even I had to buy my TS Orange on Gunbroker, and my Shadow 2 from GrabAGun . . .