I am building a custom shower in an older home. The space is already blocked in and it is larger than a standard shower size. I just want smooth and white. I KNOW this product has to exist, but I can't find anything that isn't pre-stamped to look like subway tiles or some other texture that just looks cheap and tacky IMHO. At this point I feel like the box stores don't want to sell it because then noone would buy the pre-fab shower kits that they are selling for sometimes thousands of dollars.

I just need waterproof white sheeting that I can cut to exact size and that will wipe down easily inside a shower. But I don't know if I am using the correct search terms. Am I looking for PVC or acrylic? Or something else?

Has anyone had luck locating something like this? I am hesitant to order sight unseen online because of shipping costs and my worry that it might not be the exact product I need.

EDIT: Thank you all so much for your swift suggestions! I have been spinning my wheels on this and now have several new leads to follow up on and am excited to get started again!