I have a small carpentry business and I’ve built most of my jobs out of maple ply. Our clients are asking for a specific species/color that I would have to apply my own veneer on some ply (I think??)

The project is a 16’ floating shelf, and I’d like to use something in a roll long enough that there wouldn’t be a seam, but I’m striking out online. I was thinking of a faux wood vinyl, but can’t really find that either!

How should I go about this? Does anyone have sources or ideas? TIA!