Good point on the FR uniforms. They are the A2CUs (Army Air Crew Uniforms), or at least were when I was there.
They started issuing them downrange in late 2007 / early 2008, so not sure how easy they are to get ahold of. It was a nice change from the tan nomex flight suits that we had acquired for wearing over the ACUs.
Not sure where to source them. The pockets were nice, along with the ability to velcro the pants legs over the boots instead of blousing them. And the pockets were ackward at first, but the zipper placement was pretty nice once you got used to them. And the pen pockets had a flap over them, which was freaking outstanding. The little kids were amazingly good at stealing your pens (and anything else they could get their grubby little paws on).
Fobbits wore patrol caps. Anybody who could get downrange wore either the boonie caps or the tan operator caps if they could get away with it. Ay time you could drop your helmet in place of a boonie or ball cap,you did. Quick-like and in a hurry. The brain buckets are ridiculously uncomfortable when it is 140+ degrees and you are wearing 50 pounds of armor and crap. Unless you are in a really bad neighborhood. Then you just dealt with the heat and sweat. Tan UnderArmor HeatGear balaklavas or the SpecOps gator thingies in ACU were really popular as well.
But, I was down south in 205th Corps, and my element did our best to avoid the major bases unless we absolutely had to visit them, so your mileage may vary. Crap, the guys on the big bases had to shave every day, and had to wear their PT uniforms in their off time instead of being able to change into civvies. How much fun is that?