There are companies that specialise in caravan and Motorhome reupholstery. They will have access to fabrics and colours used by the industry. Some will also be sourced from fabrics used in domestic or commercial applications. Perhaps try contacting such a company with as much detail re the caravan and it’s build details. My last van had the seat material identified in one of it’s build documents.
PS the companies advertise in club magazines and possibly Practical Caravan/Motorhome too.
Is it not the "Formica" [ or other brand] skin that is damaged?
That must be renewable by the companies that do kitchen top repairs??
If like Hymer, Hobby ought to be able to supply spares, but I suspect with our new trading arrangement with the EU it will be eye wateringly expensive.
Me, I would get it reskinned, and me being me, it would be done by me.