Harlan, we had a steel M1icon liner that came after that one. The web crown came out for replacement. It was mounted on flanges. The construction was the same as the one you show but flange fittings. They sort of slid over the flanges in the helmet. They were a problem because if the user took them out to launder he threw it in the dryer and it shrunk. Then it didn't fit correctly anymore. They're sort of scarce here now but I'll see if I can find you a pic.