One of my friends, Randy Birkey, writes a wonderful personal blog that focuses on modifying Triumph Bonneville and Thruxton motorcycles. I have done a number of custom laser engraved side cover ID plates for Randy's and his reader's motorcycles. The tags are made of 1/16th inch thick industrial outdoor sign plastic. You can read about the tags and how Randy installed them on his blog, TriumphBonneville.org. Here are a few other examples we did for Darby Racing Inc. and Bonneville Performance.  If you are interested in having some made, click here to contact me.