This might be the image I remember. Now, your caps don't look like the ones in the link you posted. Also, did you just paint your fuse box cover, or is it an aftermarket piece as well?
The ones in the link are not the ones I have. I bought mine from Drexel. I just posted that link in case anyone wanted to try them.
That is a plate that is on the fuse box cover. It was originally black, I painted it silver. This also Drexel made.