Clear Headlight Covers

The plate with the spring loaded stud would need to be riveted to the cover, and the latch plate would then need to be screwed, riveted or welded to the headlight bucket.

It won't be easy to do, but it could be done nicely with a little patience. The mounts that come with the headlight covers have a screw(?) the goes into an L shaped bracket that mounts to the headlight bucket, so even these will be a little tricky to line up right.

BTW, you could look in the specialty section in the hardware store, you might be able to find screws that would work that have a very coarse thread that would only take a turn or two to release.