2200 pcs Electronic Component Assortment Kit, Capacitors, Resistors, Transistors, Inductors, Diodes, Potentiometer, IC, LED and PCB: Amazon.com: Industrial & Scientific
DC Converter, Multilayer PCB Voltage Reducer Converter 8A 96W 24V To 12V Waterproof Aluminum Shell for Speakers(24V to 12V8A large aluminum case): Amazon.co.uk: DIY & Tools
Amazon.com: ElectroCookie Snappable PCB, Strip Board with Power Rails for Electronics Projects Compatible for DIY Arduino Soldering Projects, Gold-Plated, 3.8"x3.5" (3 Pack, Blue) : Industrial & Scientific