Re: Foam Tileable Shower Floor Pan (as seen on episode few months ago)
I have worked with the foam inset pieces before. I do not know there name and have tried finding them as well. Try a Plumbing Supply House and ask.
What you should also know is that it is not regular PLASTIC that is the shower pan. It is a thicker rubber memebrane that you can also buy at the Plumbing Supply House. You want to overlap the shower pan minimum 6' up all the walls and use roofing nails to secure it (they have a larger head). Also, there is a special type shower drain that you will need to purchase for the shower.
The foam pieces create a sloped angle to the drain for you. Alot of custom shower I have seen are flat. Flat does not drain. You can also make the slop out of plywood. Remember, after you install the shower pan (thick rubber memebrane) you will want to test the pan to make sure it is water tight.
Good luck. Process of elimination.
Process of elimination. Good luck.