Sounds like you're a glutton for punishment...well, here goes.
Got one of these going on BI about 3 years ago for a friend on a Zmodo NVR. I'm not sure but I found this old 'disabled' BI config that, as I recall, worked with the cam directly but I don't have here to test.
Give it a shot, nothing will explode (see NOTE) and the price is right.
NOTE: that cam has "Simplified" (non-standard) "S-POE" and I think is about 17 Volts DC on non-standard pins. Below the config is an image of the pinout from the
Zmodo support page.
View attachment 32814
View attachment 32815