Byonic still sells their runners for the Easton CXN mako holder. Bought mine from them a little over a year ago. Note: Site says Canada, but they ship internationally as well.
https://byonicskatebladescdn.itemorder.com/shop/product/17567745/
I also agree it’s an odd decision. The funniest part to me is how people have been complaining for the last 5 years about the aggressive forward pitch of True skates only for them to neutralize pitch on their latest SVH boot while CCM introduces it. Wonder how many people will complain about it or if the sheep will remain quiet because they’ll claim forward pitch really improves your game…