Do it yourself

Here in Iowa at Home Depot, Menard's, and the like they have sub surrounds. These are fairly common and they come in 3 or 5 pieces. They surround the walls above the tub and shower and usually have molded in shelves and soap dishes. Pretty easy to cut into...even says in the brochure about cutting for windows. Check your local home improvement place. I don't know if this is the info you are looking for, but thought I would give it a try anyway. One of these days I will be able to help someone! Kati