You are probably looking for similar devices.
https://www.adafruit.com/category/144
I had considered the passive PoE injectors myself for when I was planning to move my station.
Just a word of caution on the PoE converters, they may or may not work well, just like some USB power supplies may are may not work well.
I tried a high end audio 5v power supply and the EMI was so bad I could not use it.
You'll have to experiment, see what works.
Please report back how they worked or did not work when you do experiment.
https://www.adafruit.com/category/144
I had considered the passive PoE injectors myself for when I was planning to move my station.
Just a word of caution on the PoE converters, they may or may not work well, just like some USB power supplies may are may not work well.
I tried a high end audio 5v power supply and the EMI was so bad I could not use it.
You'll have to experiment, see what works.
Please report back how they worked or did not work when you do experiment.