You can get your acu uniform where I got mine,
www.lapolicegear.com it's cheaper than any other site and it's still real acu. Buy "propper" brand acu (no really thats the name of the brand lol), and I haven't seen any one piece uniforms in acu. Remember that arpat only works well if your wearing all arpat, OD, black, coyote, and khaki really make it stand out. Foliage green compliments it best!
A few people on my team use the Camelbak Delta-5 vest in foliage green, very nice vest with the added bonus of having a built in hydrapack