You can email me using the email address on this page: http://www.freertos.org/RTOS-contact-and-support.html and I can send some files I have on record - but they are quite old, and not tested by me so I cannot support them.
I am interested in porting freeRTOS to MPC55xx but I have no idea how to start doing it since I am kind of new with RTOS. Can you provide me some help ? ( give me some similar ports to this one )