You can get the colon cleansing kit from blessed herbs at http://www.blessedherbs.com.
I have used it before and it is very effective at removing mucoid plaque. By the way, I just got an e-mail from them for 25% off, just enter coupon code spring09. It's a little expensive but as I said a good product. After I used this a couple of times, I made my own the next time, it's really just a combination of Bentonite clay, psyllium husk and peppermint.