I really like this concept, especially since the 'original' becomes a key factor and could easily become the focus of adventure.
eg. An elite unit equipped with enchanted armor and weapons guards the king/dingus/other notable. Due to government incompetence and cost cutting, rather then multiple scattered originals being used to provide the equipment, the entire units' equipment are tied to a single set. This set is fairly well protected, but still represents a single point of failure that could turn the nearly invincible unit into one much easier to defeat.