PNMini is on kickstarter:https://www.kickstarter.com/projects/pnmini/pnmini-positive-negative-power-supply-module-for-m
PNMini is a family of high performance, easy-to-use DC/DC Power Modules for DIY electronics.
PNMini can be used as positive supply or negative supply. If both positive and negative supply rail are needed, just connect two PNMini modules together. No hardware changes are required.
PNMini is available in a small PCB package that enhances thermal performance and allows for hand soldering or plugin use. It provides +3.3V/-3.3V, +5V/-5V, or +12V/-12V output directly to your circuits requiring no external components.
PNMini family has two output current options to meet your system needs:
PNMini-500mA: supports up to 500mA output current
PNMini-2A: supports up to 2A output current