The brand is Bonvit - slippery elm. I got mine from my natropathy however I found a web site you can purchase it from for about $14
http://www.getprice.com.au/Bonvit-Slippery-Elm-Bark-Powder-125g-Gpnc_322--35232390.htm
Hope this works as well as it did for me.
Let me know how it goes . goodluck