Flex adapter used in kink/ fuckmachines.com videos

Ok master kink machinists who sells or makes the flex adapter they use in all the videos. I have searched high and low and can't find anything.
I'm not talking about the cheesy hose flex adapters other sites sell. They don't work well

From what I can recall the adapter looks like a industrial flex adapter used on power drives.

Anyone have any luck?
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