Try the Tom Kat Ammo 158 grain 9mm if you can't find Fiocchi. Plus Tom Kat is right in Gaithersburg and offers fast shipping. It is quieter than a pellet gun out of a suppressed AR.
I ran off about 100 rounds of TomKat 9mm subs on Saturday. Quieter than a pellet gun with no feeding or extraction issues. You can't go wrong with this round.
Since no one has any local, PSA seems to be the cheapest. I don't mind ordering a bunch and splitting it up but I have to warn you...my work schedule is a little busy and I live in the Frederick Area.