Hi,
S32K144 MB is motherboard from validation boards, you cannot purchase that, I think.
You should be able to run CAN_PAL_Example_S32K144 between 2 boards. Be sure you have followed example description. Boards have to be powered by external 12V and SBC must be in forced normal mode to have its CAN transceiver active (otherwise must be configured via SPI).
BR, Petr