Can't find power supply kit Dave recommends

[Pjazz]

In the video blog, it was recommended to purchase a DIY power supply kit that had its own enclosure and a DC barrel connector so that it can be powered by a wall adapter.  I have not found such a kit after two days of looking.  Most often the circuit board is not enclosed and has screw terminals to house the wires.  Do you know where you can find the power supply he suggests?

Thanks!