High-Res Realistic Mural Upgrade

I'm looking for an experienced image enhancement specialist to upgrade my AI-generated image to a very high resolution suitable for printing a wall-sized mural. The mural is for decoration purposes.

Requirements:
- Upgrade the image to very high resolution
- Maintain or enhance the realistic style of the image

Ideal Skills:
- Proficiency in image processing and enhancement
- Experience with high-resolution image output
- Strong attention to detail
Image needs to be high enough resolution to print out a 8 ft high by 42 foot wide image.
Image supplied will be 2 images that need to be merged together to one seamless image.