Screen Accurate helmet headband?

first let me say sorry about the sizing of the images...
I'm working on a Screen Accurate ESB Fett (as screen accurate as i can.. ) and was wondering if anyone has run across this..





that white plastic headband liner in there...

this is the best i have found... so far.. problem is, it's not a 6 point suspension like the original.. other than that, its the best i can find...




so the question is, does anyone out there know what kind of headband it is or better yet where to get them.. at the moment i plan on just making slits in the plastic and winging it... any help would be great!
-Jimmy

Its an old hard hat liner,
so its a bit of a mission to find an exacxt