He apparently tried to buy Ammonium Nitrate at a place called Feed and Seed. The links have been posted on the main thread. You can also search for "Norman Bombing" as a key word and there is an entire article devoted to his failed attempt.
Ellison Feed and Seed!
I know. I find it strange that there's no mention of this in this article.
It's very common for engineering students to buy fertilizer. They need it for their course work. Nothing to see here folks, just move along.