When my dad was here visiting this weekend, he introduced me to LA Police Gear, which was founded by Los Angeles-area police officers. They now serve the general public, military personnel, security professionals, and (of course) police officers. My dad, who is 6'5" and wears size 16 shoes, buys cargo pants, cargo shorts, and boots from them. He shops only in their Closeout section (must be where I get my frugalite roots) and has found some amazing deals, like a pair of Converse Foot Pursuit Desert Tactical Boots, regularly $100, which he nabbed for $8. Right now, they are selling for $39.99, but he said that their prices can change daily based on how much stock they have on hand, so he checks their site almost every day.
I'm going to keep an eye on this site to try to grab some cargo pants for my youngest, who absolutely refuses to wear jeans. Aside from clothing and shoes, you can also pick up flashlights, backpacks, and much more.