Yep. They’ve been ID’d through the trailer screenshots. Everything appears to match, there’s a link in the definitive guide to the thread where it happened.
The 44S is used in the film, it’s just made to look really old, they use an Ekco Eternia as well, both are heavily weathered up and have been altered in a way from sanding etc, Here’s the real deals owned by CreepyCustoms
You will need to mod it slightly, to be screen accurate, thankfully it’s not much a little sandpaper and varnish won’t fix up to look like the knife is here