@Philip Sure. I think this upscale was done with a version of Topaz. Why don't you ask the studio for the original and reprocess it using your deep leaning algorithm? And then compare the results... I don't think the texture packs from Topaz are very effective for VR. It would be interesting to see a side by side comparison of what your new approach can achieve.
https://www.sexlikereal.com/scenes/backdoor-picnic-825
Another upscale worth a second attempt:
https://www.sexlikereal.com/scenes/better-late-than-wetter-8912
But if you want to try something online in its original highest format, try this one by @vrfanservice . I gather the company has close ties to SLR and this could be increased in resolution.
https://www.sexlikereal.com/scenes/succubus-study-20390
(Currently 5K, so maybe try 6K or 8?)