Paul-
Funny you ask for that... I too looked for a long time for some, as I am thinking of painting my '68 that color. I wanted an original '68 Bronco color and liked that best. However, it is my understanding that Brittany Blue was not a Bronco color for that year, but only a van color (as far as Ford Trucks go). I could be wrong on this, someone please let me know if that's the case!
I did find pictures of Brittany Blue mustangs, and they looked sweet. I will try and find the links and post them up.
I think it would look great with the white top , dash, etc. Good luck!
Austin