The pre-DNR versions are on a cerTain PuBlic tracker, but only in 720p, and if you have the patience to wait for the sporadic seed activity. It may have taken me close to 2 weeks each to get STII and STVI.

For the record, the old HDTV transfer of VI is the theatrical cut, but at 1.90:1. The credits don't have a Starfleet insignia, they look the same as the other versions.

I will believe the claim of an alternate credit sequence when I see visual proof. (Could it have only been on the 70mm prints, like the numberless TWOK title?)