www.the herbfinder.com
They have a Turkey Rhubarb Formula(`Cascara Sagrada, Psyllium Seeds, Senna Pods, Turkey Rhubarb, Slippery Elm, Barberry Root, and Aloes.)
Been using it now for about 8 years.......gentle and it WORKS! + Gelatin.
About $20.oo 100 capsules