Creating a handheld cinema camera viewfinder for use in lens testing for feature films

Howdy everyone

I work as a concept artist for feature films and have recently started using VR for set design.
The Director and DOP require a way to be able to test different camera lenses while viewing the sets in VR.
I have tried using the Scene Capture 2D and projecting the results onto a handheld viewfinder, it kind of works but it doesn’t give me access to the lens and camera back information we require to do this properly, I only have the option to change FOV with this setup.

Here is an example of what I need to achieve

Thanks to anyone who can help me trying to figure this out.