Yes mine rotted out, this thread confirms it happens, Found an oil cooler on Ebay for $159.00.

Tried a quick fix by lathering the whole thing with the black permatex gasket maker. Only slowed it down, so I have to buy the part. I kind of figured with all the pressure in there it wouldn't hold but had to give it a shot.

Good thing I caught it before I ran it out of oil, that would have been not cool.