Dougie,
I am not sure how large you want the snakes, but I used one that goes on my 69 Torino Cobra. They are cast and have a sticky backing so I just stuck mine on. I think you can get them in smaller sizes, but the ones on the 69 are 3" height I think it is. As for the logo, I am not sure who designed that. I know we had a poll some time ago that people submitted designs and we all voted on them.
Ron
