I have a 1990 Miata with 340,000 trouble free miles on it but a little over two years ago I had my Heater Core replaced The original lasted 26 years so I was dumbfounded when my Drivers side carpet was soaked with coolant. The placement of the part and subsequent disassembly of the dash makes it almost mandatory to take it to a professional ($700 Labor) I want to make sure I don't have to do this again in Two Years any suggestions on where I can get OEM parts ( Mazda stopped making the heater Cores 5 years ago) and possible other causes of the passenger compartment drivers side coolant leak....