OK, I finally got off my arse and got something you can look at if you want to make one for yourself. I love mine and have given a few away. I received a decent enough factory cover w/ the '73 that I just bought so I think I shall scan it and print it out on a clear lable then stick that on the cover. If I do I'll post something on it. Rather than post a series of pic's I posted the video (2 part) on youtube.
http://www.youtube.com/watch?v=sQEYXFZTkJh
https://www.youtube.com/watch?v=QEYXFZTkJhs
http://www.youtube.com/watch?v=IgC_tPjtptE
https://www.youtube.com/watch?v=IgC_tPjtptE