To be honest... 26" is dead. Not that it should be, or that its inferior (if its your preference)... its jut not supported anymore. You would be best off going with a 27.5' hardtail frame and you can always go smaller on the wheelset. There are still a lot of options for chinese 27.5 carbon frames.. and they have more "modern" geometry.
Here you go: Factory Outlet 27.5er Carbon MTB Frame 650b Mountain Bike Frame 3K Matt 17inch | eBay
or any of these: https://www.diycarbonbikes.com/products/275xct27
Here you go: Factory Outlet 27.5er Carbon MTB Frame 650b Mountain Bike Frame 3K Matt 17inch | eBay
or any of these: https://www.diycarbonbikes.com/products/275xct27