So I ended up getting Miata sun visor blanking plates from Moss Miata
http://www.mossmiata.com/Shop/ViewPr...1&SortOrder=50
I had to trim down the outside edges just a bit for it to sit flush, as well as open up the screw holes a bit as well.
For the latches, I used a hack saw to cut off the majority of the latch, and trimmed/sanded the rest as smooth as possible. Then I repainted to the now smooth latch to match the blanking plates. It's definitely not the best fabrication I've ever seen, but it serves its purpose.
As a word of caution, the plastic is VERY thin on the latches, and I got dangerously close to sanding completely through it.
Overall, it's not hideous and better than stock and took about 20 minutes of work.
