i did log on and do a search for the chemo hats.....i too am an RN and have found that a great deal of women are choosing nice head coverings instead of wigs......here is a site i liked;
http://www.fmfcorp.com/familyspot/haircover.html
http://www.freeneedle.com/directory.php?directory=23
Hope you find the above helpful. God Bless you.