I had the idea a few weeks ago to make a passive network tap.
On campus the ECE college has a parts store called Tech Electronics that has some cool stuff like ICs and sockets led, etc… However they do not have modular rj45 jacks. They did have the name of the network guy, who was the nicest guy in the world.
He did not have any jacks, but he did give me a very nice GMP Cable Presser.
It has separate dies for rj11, rj45, some weird 6pin connector, a quality leather case, built in wire stripper and it seriously looks like was made to last a lifetime. I have no idea how old this is, but GMP from PA is still making it. Which is good, since the tool has a lifetime warranty.
Looks like GMP has quite the history, working with the early Bell Labs.
Extra Dyes:
Leather case: 
I plan on keeping this forever, it will last that long.