Where is all the .375 Cheytac brass and ammunition?

The rearer the caliber, the harder it is to find brass. Not many are shooting it, there is little money in making it. Even common 30 cal magnums there is difficultly in getting brass and ammo.
At Sportsmans there were no magnums in the thousands of rds of ammo in stock, but a 2 of boxes of 300 WM and about 4 boxes of 6.5 PRC...no other magnums were present.
If ya want to find ammo in stock, it's 223, 308, 9mm. Of course a few other non magnum calibers are sparsely represented.
Stock up if you find your favorite magnum brass. Starline is reportedly, 6 yrs behind in brass orders.
 
Some time ago i purchased "4000" 375 Hornady 390GR Atips , 500 375 CT cases ...thought it might be overkill .

Now present day ...... in Aus if you haven't got components for 375CT you might as well retire the firearm. There is basically nothing available at present for the 375CT!!
Same for Fed 215 primers... i purchased 25k when prices and availability were good....NOW !! even if you manage to find some the price is beyond comprehension!!