Where to get sets, chemist, mechanic, electrician and clippers? (Overkill's The Walking Dead)

Craft, looking at the resources, then press Tab.

Shake at the beginning of the structure. Then before starting the mission, you the player may choose what you will to craft this new set of chemist, mechanic, electrician and wire cutters. In the game one set you have to be) the subsequent need to craft)