Way to buy just the Standard 4 Power Supply?

Hello,

Is there a way to buy just the power supply that comes with the Standard 4 kit (the POE injector style power supply)?

It doesn't appear as if they sell it separately. I bought a Standard 4X kit (that's what was available locally) and I would like to completely bypass the Router 3 (not just put it in bypass mode). From what I understand I can do that if I had the power supply that comes with the Standard 4 kit.