Here are some guardians I have made. They require a link back to http://www.tie-dye.co.uk. If you would like to you can either take one of the 'Blah guards this site' ones or you can save one of the blanks ones and put your site name in the blank.
Here is one you can take for your site:

And a couple more...
Now for the ones you can customise yourself..

I'll be making more soon, so check back regularly!