Hey Rollernose, I'm having the same problem. Mine is coming from the same spot (red wire going in at the top of the fuel bowl) and when I looked up replacement o-rings the website said that the O-ring will not stop the leak and the whole sensor had to be replaced...
http://www.dieselorings.com/index.ph...&cat=3&group=2
Anybody else have any other suggestions or similar experience?
thanks