Here on the 405th the standard form of "blueprints" so to speak comes in the form of pepakura files, the software can be found here: Pepakura Designer
You can use this software to open the files you can download from the links below.
As for the rest of the suit the low to ultra detailed files can be found here on the hold archives: 405th - Halo Costuming
If you have a problem accessing those as the rest of the suit is on the old archive then just say here or in a PM to me and I'll give you a hand getting what you need.