On Mon, 23 Nov 2009 12:41:46 -0600, Tim Wescott
wrote:
So: does anyone know of an iron-powder/epoxy (or whatever) mix out there
that you can buy, or an iron powder material that you can mix with your
own resin to mold soft magnetic materials out of?

Not exactly iron powder, but you can buy a 10lb bag of #7 steel shot
for $21.99.

http://www.midwayusa.com/viewproduct...tnumber=459705

Finer steel shot is used in shotblasting (like sandblasting). There
are many suppliers, don't know what a bag of that goes for. Google
and a couple of phone calls might be enlightening.