I am looking high and low for a massaging bath spa. Which is one of those mats that lay along the bottom of the bathtub and shoots out water bubbles or jets of water. That, or a good jet spa which attaches to the side of the bathtub and shoots a jet of water and bubbles. I have a standard tub and my wife is about 5'10" if that helps. She has very achy joints and our house is very old so installing a new whirlpool bathtub is no very practical. Any help would be greatly appreciated.