Popular weapon replicas can be easily found online, usually available to order on large platforms like Amazon and Walmart. If you need a more specific niche weapon replica, checking out the various weapon replica stores online that are specifically tailored to gaming and anime enthusiasts could be easier to find exactly what you want. There are also many Etsy creators who produce replica weapons for cosplay or collectors, but these are usually art pieces that are not mass-produced. But if you are willing to spend more money, you could find someone capable of crafting a very detailed and realistic replica.