One piece RV shower - who sells them?

[PA-RV]

Does anyone know where Forest River gets their one piece showers for their upper end units like Cedar Creek? I just bought a 2019 Coachmen Brookstone 310RL and it came with a two piece shower that I might consider replacing with a one piece if the price is right. I noticed that the one piece units are much more rigid than the multi piece units. When I step into the shower, it is soft with little support under it. I may take it in under warranty but looking at a replacement option as well.

[chaps2018]

I like the concept but wonder how I would get it into my bathroom.

[T1545jh]

These units are built from the inside out. One of the first things to go in would be the one piece shower. I see no way to get it in after the fact.