Can you get plastic pipe collars designed to clip over finished soil pipework entering the wall. I can only find some that fit smaller pipes such as 15 and 22 mm pipe. I am looking for something to fit around the waste pipe at the back of the loo where it enters the wall. The waste pipe goes through plastic wall paneling and I just want to tidy up the hole that has been cut in the paneling. This is purely a cosmetic solution so any other ideas would help.