No one has answered your post. I have not found a 5 x 5 ft. tub. But I have found some nifty web sites. Some tubs are 60" x 42". Perhaps you want to check them out. www.maax.com or www.jacuzzi.com
Maax has one model called Mito 5 60"x42"x21"h.
The Kohler has a cheaper line up called Hytec, also on this site you can go to a heading called Designing Your Kitchen & Bath. That might be handy. Just trying to help. I'm going to bed. News is depressing.