I posted this yesterday in another thread.
Maybe at a resteraunt supply shop for the idophor (It was originally formulated for the resteraunt/bar industry.) It is also labled BTF if you go to a supply shop.
If you go to a pharmacy and there's an older pharmasist there and you talk to him about it, there may be a concentrated iodine tincture there that you dillute. But don't quote me on this. It's just that Idophor smells a lot like betadine solution.
If you have no luck and don't want to order online, then I'd read up on the correct dillution of household bleach and water. Actually the chemist who invented Starsan raved about bleach and water on an interview he did on the
http://www.basicbrewing.com/index.php?page=radio podcast.
Scroll down till you see these links.
They are both worth listening to.