Colin here is a suggestion. Go to Good Stuff to Go (
http://www.goodstufftogo.net/) and get their Combat Custom Multicam uniform set. You will be very happy with the GSTG version of the uniform (Blouse, Trousers, Baseball Cap). The coloring and quality is right on. Next, look for the BBi Anniversary "A" Team figure set (Brennan) and by those parts. Try War-Toys or KRAK-Troops, they still have the set or just do a Goggle search on the BBi figure and a lot of places will have him.
I have been happy with Storerooms web site (Not the eBay site) and shipping is free. At the Storeroom website (
http://www.store-rooms.com/Index.aspx) they have the Multicam set broken up in parts so you can mix and match. However, the Storeroom version of the multicam has a lot of green in the uniform which you may or may not want or like. I have purchased the whole combat custom set that was a Store-Rooms and was not that crazy the coloring. The GSTG version was kicking!
I am not sure about your bash but, since multicam is not widely used in the field by the US Military (mostly SpecOps) and the Crye System has not been made in 1:6th yet for wide distribution (US military Future Warrior test program). You have a lot of room with just using the multicam uniform and coyote brown equipment items and you bash will look great.
Hope that helps!