Thank you, both of you. In regards to your question, Panda, i found it here: http://www.405th.com/showthread.php/24086-*The-Official*-Halo-Reach-Pepakura-Files-Thread under Jico's Reach files, about two-thirds of the way down.
EDIT: Quick question of my own, whilst i'm at it; what kind of foam...