several of the catalogs offer plant tags (pre printed) in the backs of the catalogs. HPS and Harris are 2 that come to mind quickly.
BUT they aren't all that cheap AND except for rather common varieties, you probably won't find them for varieties we people in the know grow. TVers.
Here is 1 of the companies that actually makes the tags.
http://www.mastertag.com/
But their selection and minimums will most likely make you want to think of something else. At least they do for me.
Carol