Hello,
You can find the project in the following path:
<installation path>\boards\frdmkw36\wireless_examples\framework
It is located in the framework examples of the SDK.
Still, you are combining two different bootloaders, the ones you are referring to is the Flashloader and the other is a bootloader based in FSCI commands, you will need to check which ones is the one you are looking for that cover your needs.
For further information about the supported bootloaders in the KW family you can check the following post.
https://community.nxp.com/docs/DOC-341224
Regards,
Estephania