If you throw up a pic of what you want to fabricate I can help.
Here's a quick break down of a normal patch panel. At about the 11 minute mark there's a tutorial. Hope it helps. btw, I hope it's ok I post this video up. It's something I do for free and to help others. It's sort of a hobby I guess.
This would be for an open butt weld but there's other ways as well that can be easier. Just put up some pics and let's brainstorm!