Here is an Eclipse cut Sovereign 1 I purchased last year.
Besides the Eclipse ads, I have only seen one other picture of a Sov with Eclipse milling online probably 8 years ago.
This picture doesn't show the milling that well but I will post a few more in the next few days.
And of course you can find parts for Sovereign 1s on baccipaintball.com! This is actually the gun pictures in the Sovereign Parts category picture.