A while back I needed a miniature power supply for a vec 820 filter and another project I'm working on.
this is what I came up with using an adjustable regulator.
to see a YouTube video with the details please see: http://www.youtube.com/watch?v=qlxxeRZvIKQ&feature=plcp
I have 6 pcb's available for $5.75 each, price includes shipping in the US.
I have the parts list from Mouser electronics, cost of parts from them is $1.75.
if there is an interest in these boards I will look at putting together a kit.