Yes, now it is available. ...but the question was posted almost 5 moths ago - no PoE injectors were available from Fortinet at the time.
A PoE switch is a good solution but for a couple of FortiAPs, PoE injectors would be more economical option. ...and you don' t necessarily need to buy injectors from Fortinet - there are as good ones as Fortinet' s but 1.5 time cheaper.
Thank you for your responces anyway.