My co-worker has the exact same tub in his house. Worked great for his little kids.

Here's the closest I could find below. They also make a "mayflower" model that is 48x44 but it has an angle.

Have you considered a tile-in shower? I wonder if you could build a custom tub with tile?

K

Here is a link that might be useful: Kohler tub

how about this?

Here is a link that might be useful: round whirlpool tub

better picture of the "beverly" model

Here is a link that might be useful: Beverly round tub

thanks so much for your replies, I have to have a tub in that space because that is the only tub in the house, those tubs you guys posted are excellent choices, thankfully I dont have to remodel that room just yet but its good to know I do have some options when the time comes. thanks again