On Ebay, I bought some vinyl overlays for my taillights, but they did not fit well so I bought some hard plastic covers made by GTS.
No plastic blackouts are offered for the third brake light or side markers, so I decided to make them myself. First, I bought a roll of static cling window tint at Autozone for $11.
Next, I put a piece of paper over the lights and used a dull pencil to rub the outline onto the paper. Once that was done, I had my paper guides, and I was ready to cut the vinyl.
After tracing around my guide, I carefully cut the vinyl to shape.

Here was the third brake light before adding the blackout film.
I like the look much better after installing the vinyl.
My girl got me a knife with the engraving of "1969 Musatng Boss 302". It's pretty sweet.

On the last page are pics of the finished exterior of my 69 Boss 302 tribute.