This guide will let you know how to get the High Noon and Crushing Ruin in Warframe.
High Noon and Crushing Ruin both can drop as a B rotation rewards from the spy missions on Lua. You will need to crack at least two vaults to get the B rotation rewards.
It is recommended to bring either limbo or nova to make getting through parts of the vaults easier.
It may take you some time and a few runs before you get the mods, as they don’t necessarily have the highest drop chances.