I still have not been able to locate a single photo of this combo, not even on a Google image search.   Can anyone help?

Well since no one else is going to answer; in the main BRN thread there was some discussion of ambi lowers:

https://www.ar15.com/forums/AR-15/BRN-180-Review/126-740125/?page=8#i8131167

Next reply says the Rainers one works.

Port door cover would smack the ambi catch/release on the LWRC/LMT setups. To boot, looks like it suffers the same issue as the MCX in that the upper receiver is thicker, so might actually push out the catch natively.

No hands on experience with it myself but I highly doubt it'll work, from the outlook of the port door cover alone.

The upper would not even close due to hitting the right-side bolt release paddle. I was able to install it after removing the dust cover.  A guy on Reddit who successfully put one on a LMT MARS ambi lower helped explain how to remove it, since the C-Clip is super thin and hard to see, and not in the same place as on an AR-15. The right-side bolt lever both locks and releases fine. I'll keep you updated on the build progress, as new parts are in the works to replace a lot of what you see in these photos.