wow.. and that's 20 minutes of your life that you will never get back
honestly though if you actually follow the patrol routes you will find something.
as for every singles jumpgate/hole and every single system.. i don't think anyone here really has the time or inclination to do that.
individual systems can be found by asking in the spoiler forum.. so if you ask there for a SPECIFIC system.. i'll be glad to help

Just use FL Datastorm.. has locations of everything in the game...

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Welcome to the Darkness

One of the Unknown (Nomad) jump gtes is in the middle of the big green cloud at the top right corner of the Omicron Gamma system. Best thing to do is be corsair/bounty hunter friendly/neutral which will make trips there and back easier.

Make sure you have a class 10 shield too...3-4 shots from a nomad will drain your shields and then blowing up is soon to follow. This happens a lot when you jump inot the Unknown system, as they have a tendency to ambush you right out of the jump hole.

True, I got the jumphole to Omicron-Beta by giving money to a dude in a bar and nearly survived the trip to that forbidden place

Hammerhead with class 7 shield was the minimum there.