Ken,
Mallinckrodt Baker sells bromine and they are located an hour and a half north of Phily in Phillipsburg, NJ. One liter is $49.85. Not sure if it is stocked at that location so calling ahead is vital. Also, chemical companies (as you know) will not sell directly to individuals. You must be a company or an educational institution to purchase from them.
Here’s a link to their contact page:
http://www.mallbaker.com/contact/
There’s a search field in the upper right hand corner of the page, and if you change the default to “Products” instead of “Site” and then search for bromine, you will find it.
I don’t use bromine water, but isn’t it also feasible to find some at a swimming pool supply store? It won’t be reagent grade (the farthest thing from it probably) but it might also work. And anyone can buy pool supplies.
Cheers,
Rob McElroy
Buffalo, NY