You can hunt around for some Airsoft players. Their guns are quasi-realistic, and I'm sure they'd be happy to show off their weapons to you (I don't know about letting you borrow them). You might need some electrical tape to put over the ends for your photos, but aside from that it'd be pretty good (reason being, the ends are frequently bright orange).
I checked your examples by the way, and I have to critique them a bit. If you're going for realism, then a bo staff won't work, and neither will those specific knives. You'd have to get more utilitarian combat knives, such as military issue ones. If you're going for more of a fantasy-styled mercenary game, then just ignore this paragraph, because the weapons are cool.
