The CAN connectors and LIN connectors on both boards look like they are Molex connectors. They look like the same connectors as the CAN and LIN connectors on the SK-S12XDP512-A which has a BOM on the softec site. The CAN connectors look to be part # 39-30-3047, you can find them on Molex's website which should be able to give you a mating connector and what distributors have them in stock.
- Brett