Well Big, I went through two of those cardboard pieces of junk that the vendors are pushing off as reproductions and just decided to duplicate the original as close as possible. Luckily I had the old box, although it was torn, frayed, ripped etc., I was able to get dimensions off of it and made a Masonite template for future applications.
Here are a couple of pics that show the fixtures, scroll back to see the rest.
http://rides.webshots.com/photo/2974769140098611668FmvhuP Denny Graham
Sandwich, IL