(Note, this links just leads to their catalogue. Find them on Facebook for more info)
Danish LARP manufacturer - as far as I knowm, they ship to the US (if not, I can get the stuff and send it - of bring it to Dragon*Con, if you're going *G*). They've recently done a new series, called Dark Moon (back of their catalogue), which contains some really good stuff for Warhammer 40k. Witness their "chainsaw"
They have a "vibro glaive" that seems pretty inspired by the Grey Knights' weapon, a riot shield that would work great for anyone going for an Adeptus Arbites costumes and a "vibro sword" that's quite clearly a powersword. Plus, some neat props, mainly for fantasy, like a small, brass telescope in a leather pouch. Their weapons are a bit on the pricey side, but very good quality.