You can buy Himalayan salt bricks with 1 rough side weighing 2 kg (20x10x5 cm) from Himalaya Salt Shop. There are 10 pieces packed in a box. Here is himalayasaltshop.com/product/himalaya-zout-baksteen-met-1-ruwe-zijde-20x10x5-cm/ detailed product information. On the site you can freely make wholesale orders. There and the prices are favorable.