You can have a custom built 408 Chey-Tac, 375 Chey-Tac, 375 Snipe-Tac, or 338 Snipe-Tac built from the ground up for way under 11,000.
I have a 375 Snipe-Tac (408 Chey-Tac necked down to 375 and improved) and a 408 barrel in waiting for the standard 408 Chey-Tac.
You can have complete custom rifle chambered in a Chey-Tac cartridge with an 8-32 NXS for roughly $6,500 with a McRee stock or roughly $7,000 with a XLR stock.
This is from a gunsmith that lives outside of Gillette.
If you want more info you can PM me.