How do everyone else get one?
We rank up with the Federation. You'll get the permit within 3-4 missions for them. Nothing difficult, just deliver item A to location B. I've amassed 4 different permits by now, is a Warrant Officer, and only one mission have included using my guns. On the other hand, it was shooting a traiterous general who was being ferried around in a Fed Dropship. It did not go down fast or easy, but eventually I got it to disappear in a puff of smoke and flame.
As for the OP: Those that do play in open, like me, are spread around. Quite a lot hang out around Lave due to having nostalgic memories of that location and its surroundings in the original Elite. A large number of players are also hanging around in Evil Empire space. Don't ask why. Yes sure, maybe they are drooling to get an Imp Cruiser, or maybe they are just less morally endowed and hence fit right in.
Myself, I'm on the border between the Feds and the Imps - making my moneys doing trade whilst slowly transforming my Cobra into a formidable fighting machine. A little bit more, and I'll start infracting seriously into Imp space. Heat up the cold war a little
Sol isn't that far off though come to think of it. some 70-80LY 'up' from my main base.