This mod lets you sort all items, including both obtainable items and those that are not, in your item shop, making it easier to find what you are looking for. 

Sorted Shop contains all items that can be bought in the game, including both those obtainable by missions and those that are not. The items are organized by type and ID, making it easier to browse through the items. You can also see what is currently in the shop, making it easier to decide what you want to buy.

To install the mod, you need to first install the game, then move the nativePC folder to your installation folder of Monster Hunter: World, and finally, navigate into the nativePC folder, and then rename the shopList.slt file to its original name (has to be anything different than shopList.slt so the game doesn't load it).