MD, there is also a subforum here that is specifically for Contemporary Cobras, if you go to the main forum menu and scroll down a little. You might try posting there regarding an assembly guide. Also, I’ve heard of non-ERA owners using the ERA assembly manual as a guide. I believe you can download the whole thing free from ERA’s website.
Edit: Here’s the ERA link. Download is free but lacks some illustrations; $30 to download the illustrated version.
http://www.erareplicas.com/download.htm