Bathtub Units Does Anyone Know Where To Purchase A Waterproof Curtains To Cover A Window In A Bathtub Unit?

Does anyone know where to purchase a waterproof curtains to cover a window in a bathtub unit? - bathtub units

I'm going to an old house with a window with wood trim above buy the bathtub. I'll have to use the bathroom and the shower to cover the wood for their protection. Has anyone suggestions, where a window curtain, waterproof and also buy a set of shower curtain?