Once you changed it, it can't be obtained from general gameplay. I tried to craft it, but ran out of implants.. i think Enhanced Targeting Implant should be added to implants drop system.
Yeah that one doesn't show up in the implant crafting screen. It cannot be missing, as you cannot craft with it. You have to go into your loadouts and click on the the implant slot, it will be there.
lol Happened to me first time I went looking at the implant crafting screen. Lucky for me I figured it out before I made a fool of myself on the forums