People who are building their suit on the cheap, not just Boba Fett, might need to use some foam board.
Thought I'd throw in my technique for bending it.
Fill your sink with the hottest water your tap can produce and soak your foam board for 5-10 minutes, make sure you mark your lines before the soak, tap dry the board and start bending.
I used scotch tape to keep the desired shape until it dries. I let it set for a few hours, 5-8. And the foam board will hold it's shape with no weak points.
I got the technique from a remote controlled airplane website, and thought I'd share, and this is how I've built my entire suit. Hopefully this will help someone else out with theirs.