attaching door panel emblems

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Looking for ideas on how you install these emblems on new door panels. When I replaced the woodgrain on my Challenger door inserts, I used some clear 100% silicone on the "pins" of the Fratzog emblems. Those emblems were attaching to a pot metal piece however. The Dart emblems will be attaching to cardboard.

Is there some sort of "extension" that can be added to the "pins" on the back side that would allow attachment with a thread cutting nut? If you're just gluing them on, what are you using? The glue would have to stick to vinyl. Thanks