From Dark and Darker Wiki
Not only do I not have a lot of these available to craft (I assume ill unlock them with quest completion, but that should also probably be specified on the wiki crafting entry for clarity's sake)
but, I am also noticing that you can craft a bunch of common "sterling" weapons with default weapons + silver powder when I look at my crafts for weaponsmith. Page def needs some touch ups, I'd do so but I have no clue how. xd