where can i buy perdiem granules (not the laxative) the brown bottle fibre supplement

perdiem had a wonderful product that is 10 times better than metamucil and other competitors. it has been taken off the shelf at walgreens and walmarts. the only products available are the tablets (yeechh) and the laxative products. perhaps you could enlighten me on the whereabouts of this product (my doctor agrees that perdiem fiber supplement is far better than anything else on the market) im looking for the granules in the 10oz brown bottle (the yellow bottle is a lxative). thank you for your help! carlos.molinar@earnhardt.com