Have you tried some regular gigabit injectors and failed, or just can't find any rated for 2.5g? An injector is just an extra set of ethernet magnetics with the center taps connected to power. I don't have my APs yet, but in theory the gigabit ones should work if the cable run is well short of limits. I have cat6 throughout which should help with that as well.
Engenius sells "proprietary passive" PoE injectors too, so at compliant shouldn't be a requirement as long as it's 56V with enough current.
Engenius sells "proprietary passive" PoE injectors too, so at compliant shouldn't be a requirement as long as it's 56V with enough current.