The Gerbers and BOM for the BLE009A CC2650STK IO Demo Dev Board are now available through the Downloads page.
You can use these files to build your own PCBs.
BLE009A CC2650STK TI Sensor Tag IO Demo Dev Board – Detailed Product Page
EvoThings AppVer00A _20170710 – Works with Demo Firmware FWVer00A Hex _20170629