The fourth update to the Release 12 Autoconfig Templates and Engine is now available for download now via:
AutoConfig Update 4 screenshot: Screenshot of download page for E-Business Suite Release 12's AutoConfig R12 TXK.A.Delta.4 Patchset (Patch 6329757)

This patchset is cumulative and includes all previous R12 AutoConfig updates such as TXK.A.Delta.3 (patch number 6077487) released with the Oracle E-Business Suite Release 12.0.3 Release Update Pack.

TXK.A.Delta.4 can be applied standalone on top of base R12.0 or any of the later R12 Release Updates (12.0.1, 12.0.2, 12.0.3). This patchset is also included in:
If you have already applied either of the two 12.0.4 updates listed above, you don’t need to apply this AutoConfig patch separately.  On the other hand, if you’re looking for the latest AutoConfig templates and don’t wish to apply the larger 12.0.4-related updates, this is a smaller and more granular alternative.

This Patchset contains fixes required for support of some of the upcoming Application Server and Database patchset certifications with E-Business Suite R12.  For more details, refer to the README of the Patchset.