The First Imperial Stormtrooper Detachment has a LOT of good threads on modifying a Master Replicas CE (MRCE) helmet to 501st standards.

Here are a few links:

Note to NEG troopers – putting our own content here would be good!

costuming/original_trilogy_troopers/mrce_mod.txt · Last modified: 2010/04/18 20:42 (external edit)