ferric chloride

Hi All,
Speaking of raku, does anyone know where ferric chloride can be
obtained? I'm getting ready to get my own raku kiln and I like the
brown highlights spraying ferric chloride on horse hair pots gives. I
looked in all my pottery supply catalogues and can't find it. I was
rakuing at friends and hers was bought at Radio Shack. I called them
and they have stopped selling it. I know it has to be handled very
carefully but I need some for the results I am seeking. Or is there a
substitute chemical I can use? I live in the northern Shenandoah
Valley area of Virginia, USA.
Thank you for any information,
Sandi