The source code is located in the following directory -
<PSoC Creator install directory>\cybootloaderutils\
This directory only has the api code. I am looking for the Visual Studio project.
http://www.cypress.com/documentation/application-notes/an213924-psoc-6-mcu-bootloader-software-development-kit-sdk-guide can be reference of understanding PSoC6 bootload. AN73503 has the reference of Visual Studio project, I don't see an exact visual studio UART PSoC6 project.