Question about a scene in Halloween 4

Hi all, I’ve always wondered what masks were used in the H4 scene where Dr. Loomis and the sheriff are surrounded by the boys wearing the Myers mask. I’ve never heard this mentioned, does anyone know?

Probably just extras cast from the mold and done up real quick. I could be wrong though. One of these would be interesting to see! I wonder if they’re still out there?

That would be cool if they are!