Help if anyone has any suggestions

I got married to my Husband in 2024. We have been trying to conceive for the last 4 years with no luck. We were talking about sperm donation. He informs me he donated when he was in the 2014-2017ish. I am now looking frantically to try and find the sperm he donated. If any one has any tips. Besides for sitting down with his info and calling every sperm bank in North Carolina. Please I would love to know. I know they won't give out his name to me. He can't remember the town. As he got ptsd from the military. He was 6'1" brown,Hair,green eyes, and Caucasian.