Talk:Spinning Needle/@comment-33187620-20200101203906/@comment-2A01:111F:F2D:5200:79A6:C6F7:3B18:7D1D-20200202092133

Pick up the Orokin Derelict Emissary Assassinate blueprint from the market, you can farm Zealoid Prelate for better chance, though it takes an hour to craft.

Considering however that infested missions are super enemy dense and Leapers are one of the two most common infested enemies I'd be surprised if most players didn't have a copy stashed somewhere already.