Sorry to reply to my own post, but I found a link in Gardenweb that may
help you.
http://www.yardcare.com/expertadvice...waterpond.html
The product you might like is described in the body of the article,
kind of far down. Just read it, but it is introduced with a subtitle.
It isn't a liner, but is designed to go over your liner. Good luck
with it.