Was watching 007 The Living Daylights last night and this inspired me to an interesting idea... Arms Shipments. Other movies like Predator would be inspiration too ("man we really hit the jackpot this time, they almost got across the border with this stuff")
These are Weapons/Equipment packages that you just get standard sets of stuff, with varying degrees of quality or focuses. You pay a real premium for them but they often include pieces that you normally would not be able to get your hands on without alot of elite pre-reqs. For example a couple ES Lasrifles, a Servo Mortar with a bunch of Gas Rounds in a different one, maybe an ATGM in a different package. But each package also includes reasonable assortments of gear or possibly raw components like integrated devices - the idea is you buy a package and get a bunch of grenades, rifles, pistols, smgs, etc etc to outfit a bunch of dudes in a paramilitary and maybe a few of those items are really spicy.
The price would be high enough to make it a considerable thing to work towards. Example...
1 million (bargain basement tier, just a bunch of normal stuff to arm a militia, but maybe some obscure things too which you cant normally buy that might be deployed in a pogrom).
5 million
12 million
22 million
50 million
150 million (probably has a set of bootleg plasmas in it)
Basically the idea is to let someone else bear those contacts and pay them the tribute to get access to that as a middleman. Krazy Hassan + Jack Favors could be the entry door to making special weapons shipment purchases. A few other indirect Contacts could expand the selection into the higher tiers.
They'd take alot longer to deliver (due to safety, like 15-20 days) and show up as an Item that has to be Disassembled similar to a strongbox.
This is in contrast to the Military Transport enemy mission which is more like a resupply of various palms-up organizations.
Gambling and Old Earth Boxes certainly can provide some early goodies but with an Arms Shipment you secure, with money, what you know you'll be getting.
Hot Protip: there can also be random production so that a few amounts of things or spare goodies might find their way into the crate. Like instead of 2 Lasguns there might be 3, or there just might be a couple adv clips to go with them. Huh, why are some of these Niner Clips red colored with glowing bullet tips... man do you know how illegal this stuff is...