Depending on the faction of the player there will be a different dialogue and reward.
Dialogue
BEAR:
“
Oh, brother, come in. Do you want to get something cool? I have an update for you, but it's rare and not cheap. Bring me these things, and don't let them be worn out, my supplies are completely out, and I'm overwhelmed with orders. Try to find it in Ultra, they used to sell such materials there back in the day, but the looters probably took it all over Tarkov.
„
USEC:
“
Come on in, no need to stand in the doorway. I have a business for you. I'm all busy with orders, and I'm almost out of materials. Can you find some? I will be able to offer you something new for it. It won't be cheap though. Made in.. well, you know where. And yeah, make sure that those materials should be in good shape. I'm pretty sure they used to have such materials in Ultra back in the day. Good luck.
Aramid fiber cloth can commonly be found in clothing stores on Interchange. Ripstop cloth can be found in the same locations, though more rarely. They can also be found inside of Sport bags, Buried barrel caches, and Ground caches.
Paracord can be found in Sport bags. They can also be found spawning on the map Reserve. For more specific spawn locations visit the Paracord page.