I got a couple of fender emblems off eBay for $5.00, I cut off the fender mount and sanded it smooth, then I removed the key cylinder, filed and sanded the trim ring down so it would be smooth with the surface of the trunk lid. A little 3M double sided tape and voila'
Sorry, took the picture with my phone, photo quality is not as good as my camera.
Looks clean as hell Charles, I want to do this with a Ram emblem I have on my trep. As I understood on the trep all I have to do is apply 3M tape and leave the center of the badge empty so it just covers up the key hole. Sounds like you had a lot more to do.
I wish the original owner had covered the keyhole when he had the car painted, I never use the key on the trunk anyway, so I just wanted to cover it up, it really does look like it is supposed to be there.