It is a double back tape that you can get at some auto parts stores. For the amount you need, you might do better walking into a body shop with the two in hand and pose the question. You might well walk away with enough to put 'em on. . and have the RIGHT tape. .
Others can advise of particulars, as it has been discussed here before. .
I took off ALL of the badges on mine, including those and like it better, but that is personal choice...