My two cents everyone.
A Parks replica is a very good guess. It's very close, I don't know if Parks changed minor manufacturing things throughout all the MPP Replicas he made. I have an original Parks, I'll have to dig it out and take close up pictures.
For the chrome to have come off that much, and with that much tarnish, my guess is this is at least 10 if not more years old. This could also be a Yoda's House, or Blast Tech MPP replica. He definitely made MPP parts, and i thought he offered full replicas at some point through the site.
If there was more damage to the endcap, I would suggest a Heiland mount embedded in an old Heiland endcap