The Swedish National Heritage Board has some excellent old images of rune stones posted in their flickr photostream. I highly suggest that you have a look at these fantastic shots which show great details of runes carved into stones.
The Swedish National Heritage Board are members of The Commons which state that there are “no known copyright restrictions” to their images. As shown on their website they state:
The photographs are available free of charge if you download them for private or non-profit use.
Seeing as, at this moment, this is a non-profit website, I feel the images are safe to share.
Footnotes / Notes:
All images taken from the Swedish National Heritage Board's flickr photostream and are thought to be free of any copyright.