Looks like the basic Kodak product facts page. But if you can't get Photoflo 200 as a privateer, why not have some shop, company or similar front a group buy? Even a small amount of it (I guess the Photoflo 200 is even stronger than the usual stuff, right?) would last you a long time I suppose.
I have sourced stuff through companies handling pool supplies, fireworks chemicals and assorted other places.