I can't believe that they discontinued these parts without having some kind of retrofit kit. I have been looking for these for about 2 weeks now, not that I need them but at 163k I would like to replace them along with all the other hoses on my car. I am almost to the point that I will buy some 3/4 or 5/8 hose nipples and silver solder them to the heater core tubes. The manufacturer of the fittings is a company called Teklas. I have not found anyone that carries just the fittings yet but I am still looking.