New project wizard for a Freescale MQX 3.8 project can be installed via CW 10.3 update site.
In CW 10.3, go to Help->Install New Software... and select the FSL MCU Eclipse Update Site as shown on the image below:

Select MCU v10.3 Updates for MQX and Next > until installation starts. After it is finished, restart the CW 10.3. File->New menu now has the option to create MQX 3.8 Project.