Der Wikinger Laden
Der Wikinger Laden is a German web shop selling a variety of LARP related products. Their site is in German and English.
Their helmets, shields and weapons are metal, so clarify these are usable in your LARP system. They sell a variety of LARP accessories, including jewellery, bags, drinking horns, games, patches, wood and leather items and even more goodies to be had.