Part 1 - This is located at the table in front of where you spawn.
Part 2 - At pack-a-punch. The first spawn is left of the gobblegum machine. The second spawn is down the first set of stairs on the left side of some boxes and next to a bright light. The final spawn is at the bottom of the wooden walkway on some boxes.
Part 3 - The first spawn is at the bottom of the tunnel next to generator 6 is on the ground next to a little generator. The second spawn is in the big muddy path at the back of the church next to a sign with a skull. The final spawn is in the muddy path of generator 4 next to a sign with a skull.
Craft - You can build this in the tunnel near juggernog or in the wind tunnel.