In the process of pulling the starter on my first gen, I found that the small nipple of the radiator was merely held in by JB weld, which I completely disdain, and when wiggled just a smidge fell clear out.
After looking at some of the ebay prices, and trying to shop around for a used one, I took mine to the radiator shop and asked if it could be fixed. He said "absolutely, won't be a problem". I asked if he could flush and leak test it as well, and asked the expected price.
Then he drooped his head and said, "Well, for something like that it is pretty expensive."
I thought, "Oh hell"
Then he said, "I feel like I am stealing from you, but the time is what you are paying for. I have to ask for thirty bucks."
I said, "Well, a guy has to make his money."