After a few days of checking out every store in the area, I finally found a mirror that was the right size. I needed a narrow mirror because the window trim invades the space above sink. I bought the mirror you see below. I found it at T.J. Maxx for around $20.00.
(The green plastic plate is the palate I use for my painting. )
Nice size - wrong color. But I wasn't worried because I have an arsenal of craft paint. I took my acrylic craft paint in silver and brushed it lightly over the gold areas. I let some of the gold peek through because I didn't want it to look too matchy-matchy with the other silver in the room. I didn't mind if it looked a little antique.
Because I wanted the dark background to still show through, I took a Q-tip and rubbed it into each groove around the mirror while the paint was still wet.