I have not seen it yet but a friend said her standard tub was retro fitted with a door. ???? Me? I think I would get a seat to put into my shower and just unscrew the shower head and screw on one with a hose. I am kinda cheap.
That's the arrangement I have in my master bathroom -- no tub, walk in shower with detachable shower wand, and a removeable teak bench. I think what I really want is a hot tub. But there's no room for that on my condo deck.