Firequest is still in business. I wouldn't fool with them though. The owner is a liar, a sneak,... The DOJ warned him many, many times, yet he continued to sell illegal stuff.
I asked the DOJ some very specific questions. The "birdbombs" fell under their jurisdiction because of flashpowder. I asked about all the other products that Firequest still sells and the legality of it. The answer was that they don't fall under DOJ rule or enforcement. So I assume that the rest of that stuff would be BATFE. When somebody at BATFE gets a hard on for them, they will get another visit, records will be confiscated, and so on.
I wouldn't give Firequest $1 to clean my bathroom. In this day and age, you are guilty by association. I would advise buying your t-shirts somewhere else.