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