@Maicol, I don’t have the source of the original image and am unsure where it came from so it may be a difficult thing to track down. I did manage to find a similar environment, but the lighting is definitely different due to the low angle of the sun:
The Walk of Fame toward the bottom of the page.
The problem with trying to extract the images from the DDS is that you will only have 128 px images per face so the edits won’t be easy. And there is the challenge of extracting all of the lighting information from the DDS intact for edits. It may be worth you starting with an HDRI environment that you find that is high-res and creating an .env file from there. That way you have full control over the full resolution and exposure levels in the file before reducing to an .env.
I will keep an eye out and see if I run across the original hdr, but I don’t have high hopes at the moment. Wish I could have helped more.