I have found a new place to buy most photographic supplies for both color and b&w. This includes chemistry, filters, roll paper, and anything else you can think of. I am not sure how good their prices are, but for 1 qt of Pec-12, I paid 58.00 verses 67.00 at B&H Photo. I suspect you will find their price very competitive.
The company is Liberty Photo Supplies and their website is http://www.libertyphotoproducts.com/Default.aspx