Attached Link: http://www.floorplan.com/

Go to this site and check out IMSI's Floor Plan. You can make any room you want including a bathroom using your own design or presets. It exports in 3ds. You'll have to texture in Bryce or some other program and exort again before it works in poser. I gotta tell ya, its an awesome program for building rooms or houses. But like I said, you need Bryce to work the object around before importing to Poser.