Hand held thermal imaging camera

Hi, I am trying to produce an in game hand held thermal imaging camera.

I have been able to make the prop and using a scene capture component and render target i can create a live display on the rear of the device. Separately using a marketplace thermal vision component i can create a thermal vision effect which affects the entire viewport using player camera as input source. However when i came to connect these two solutions i found the scene capture component is not compatible with a regular camera class which is required as the input source for all the thermal vision components i have checked so far. Is there a solution for displaying a thermal vision effect onto a hand held prop in this way? It feels like there should be a way to cast the scene capture as camera but i have not been able to find this yet. Any advice welcome.