Mk 8 Blastech Weapon Mod Protoype Salvage Drop Rate

After reviewing the patch notes I saw nothing adjusted the drop rate of mods. However, I've spent a total of 398 energy today searching for my final "Mk 8 Blastech Weapon Mod Protoype Salvage". I can sympathize with developers trying to make this something you work hard for, however you would think at least 1 one drop in nearly 400 energy. I'm trying to stay calm about this, however I really enjoy this game and this is absolutely ridiculous.

Anyone else seeing similar results when it comes to farming mods/gear?