Implants, implants, implant... jesus this word echoes in my head every time I see a post about it. Seki says the truth.
Now let's do some simple math.
There are 2 boxes that spawn rare stuff with 2% chance per spawn which happens each 20 minutes on average.
This means that there are 2.88 rare spawns per each 24 hours.
Boxes spawn various rare stuff and there is 58% chance that some random implant module will be spawned.
So all in all, there are 1.68 implants spawned every 24 hours on average.
If this means lots of implants for you and you start talking about adding an option to buy those from NPC, then I'm like what the fuck.
Boxes spawn buffed tier 3 armors and weapons (buffed Gatling Laser as well), they spawn various types of Combat Armors too, and sometimes rare ammo or hypos.
There is also a low chance to get rare stuff like Power Armors, Bozars or implants. But it would take a while to get the server spammed with those.
Boxes are guarded so you can't just enter with bluesuit or sneaker, take it and get out (unless someone else will kill enemies for you).
It's exactly what you asked for in over 9000 threads about New Reno lockers and other FOnline: Locker edition loot.