Build 7077 has been known to be available on various torrent sites. High chance is that this will be the final build before RC a.k.a RC escrow. The RC build is projected to be 7100 with builds 7105 onwards to be new developments under the RC phase.

Build 7077 should carry the file name 7077.0.090404-1255_x86fre_client_en-us_Retail_Ultimate-GRC1CULFRER_EN_DVD.iso