Nah - look for them as mission rewards - they're common rewards like (all?) engineering requirements.Ouch... so i should start looking for a Maverick with quieter footsteps since this seems to be quite out of reach - both in terms of engineering and materials, although i do have 4 Tactical Plans and 7 SAPs but no idea where from. Could be missions tho since i rarely hit settlements with CMD buildings and Security Ports