To be clear, the legs would support the topper when it’s positioned over the tub, and also support the topper when it’s beside the tub? If that’s the case, do the legs really need to fold away? Would fixed legs be acceptable? Or is there a requirement that the legs be foldable to provide clearance over the edge of the tub?
You may want to include a photo of the piece, ideally many photos from various angles.
But to be frank, unless you find someone within a max 1 hour’s travel distance, it’s not likely someone will be found who is also willing to take on this project. Wood furniture is, for all its pros and cons, heavy.