I got my shipment from WTP Tape and redid 4 flashers and they turned out very well. They have precut flasher tape that is cut to the shape of a flasher so its easy to install. I got the Silver and the Yellow dressed up with the red tape that is really bright. Looks good, a lot cheaper than buying new flashers.

http://www.shopwtp-inc.com/product_info.php?cPath=45_33&products_id=1917