The R13 & R14 PSUs are proprietary. The R9 PSU is standard ATX format. Consider a PSU that is fully modular, and no longer than 150mm.
Hi there, my dear Aurora R9 has died recently and I've been doing some diagnosing and I believe my power supply has died. I just wanted to confirm are the parts proprietary or can I just use any power supply off of a shelf. Of course with it being high enough wattage to handle the specs. 
Aurora R9 Proprietary Parts