While it existed internally at Microsoft and may have been seen by some EEAP testers, no bootable ISO is confirmed to exist in the public domain. Any claim of a downloadable ISO for this specific build should be considered unverified and likely fake .
Build 6469 sits in the development phase of Windows 7, around mid-2008. This was before the first public pre-beta (Build 6801) and the official Beta 1 (Build 7000). The fbl_eeap branch was a private, partner-focused branch for early adopters and select OEMs. windows 7 build 6469 iso