Two questions (Encased)

there are loks in the wastelands, "The fallen capsule" take them apart and you will get fiber. I do not know about perks.

Gesser86
fiber is in the suburbs, there is a capsule (an elevator fallen) behind a cafe. As for retraining, until I found it, I think not, maybe a save editor will appear or cheats

Straik29a
There are at least 3 of these capsules, and this very fiber is taken from all dismantling. There are capsules in the Scourge camp and in the location, all of a sudden, "Crashed capsule". it is she who is closest to Carmine Hydes.