Lens collar replacement for Nikkor 500VR?

[shane shacaluga]

I have found a 500VR lens at a decent enough price, but part of the reason it is "cheap" is that it has a broken lens collar

Is there any company that sells these replacements along with the lens foot? I can only find replacement feet but not the collar itself

Maybe even an upgrade to provide a sturdier support to the lens?

Thanks