A word of caution- if a LEO ever sees non-rosette rivets on your VIN tag, you could be in for a huge headache.
$35 for rivets is a drop in the bucket compared to impound fees, and possible legal fees.
Heck, members on here have had issues with proving their '65 and earlier cars are legal since they had no rivets in them and the cops didn't believe it. I'll see if I can find the threads.
Edit: Here are some-
VIN Plate attachment to the door jamb
Serial Number Tag
