actually found it on another forum, here's what I was talking about. Take the BNC side off and it's what I was looking for. now excuse me while I go bang my head into a wall.
The RF Sampler you listed RatsoW8, is actually what prompted me to start looking for this one that I found. I saw that project and remembered I'd seen basically the same thing set up but for headphone use. There have been simpler designs though, but I can't remember them. One I believe involved stripping some coax and wrapping wire around the center conductor to sample, though I'm not too sure I'd want to attempt that method.
Thanks for the help guys, and a tip of the hat to doughboy at CBJunkies for making that search a little easier with the provided schematic.