In our main bathroom, we replaced every single thing except the wall mounted medicine cabinet (to the right of the vanity).
Although we kept the cabinet, that was built into the wall, the door was immediately jettisoned. Here it is, in the garage:
Unable to find a nice (cheap) door to fit our cabinet, we made a simple one!
|On the cabinet base|
|One the inside of the door|
Just like with the kitchen cabinets (see here), we used a bit of white caulking to hide the bit where the existing cabinet (built into the wall) was a touch off from the house. We found out everything is our house is just a little bit not square.