@Wumuckl, you could use an UBNT EdgePoint-R6 configured as a switch (it's a router, but you can use it as a switch, too). I use an EP-R6 to supply power to two CPE 510 over just one Ethernet cable to the switch.

However, I don't know what NanoStation specs for PoE are. Does it use 24 volts? If so, check whether the EP-R6 PoE power budget (~23 watts total for all PoE ports with its included power supply and up to 70 watts with an etxernal power supply) can power the NanoStation in addition to the CPE 210, which requires ~10.5 watts @24 volts.