I really don't think there is such thing. I can appreciate why you would be interested in such a system, 75 new toilets will be expensive. I will say that if/when you decide to go with new toilets, don't be foolish and buy the cheap builder grade junk an the Big Box Stores. You will be plagued with as many problems as you have now. Toto is not a cheap toilet, but they will give you service for many years with only an occasional inexpensive and readily available repair parts.