Hello Peter,
You can find Processor Expert example projects (with KSDK 1.2.0) in the KDS_3.0.0\eclipse\ProcessorExpert\Repositories\KSDK120_Repository\Projects\Kinetis\Processor_Expert_SDK folder. But there are not I2C and SPI examples.
You can find KSDK 1.2.0 I2C and SPI example projects in the KSDK installation folder KSDK_1.2.0\examples\ (see for example KSDK_1.2.0\examples\frdmkl25z\driver_examples\i2c , KSDK_1.2.0\examples\frdmkl25z\driver_examples\spi).
Best Regards,
Marek Neuzil