While browsing through some Fett pics for comparative purposes, I noticed something that I had previously overlooked. Check out this still from Chronicles:
Now at first, I thought what I was seeing was simply an ROTJ stunt helmet, which is still an exciting find for me. However while comparing the weathering marks, I noticed an ESB white "decal" (decal not necessarily meaning sticker) on the left ear-piece. Also note the helmet "stripes" are yellow. And the weathering on the helmet matches an ESB helmet. Soooo there ya have it folks!
-edited to update image