We, too, have radiators and are wondering what we'll do for the ones that we don't have covers for. The ones at that website Chicagomom posted are beautiful, but dang it that they aren't in our price range.
Ours look kinda homemade, much like this http://doityourself.com/hvac/radiato...-e2diy0181.htm
. Unfortunately, they still have hard corners and edges. Good luck with finding something!