Is there an RTC 6.0 Eclipse 4.2 plain zip file available for internal IBM use?

Other than the Installation Manager downloads, there isn't a download of the Eclipse 4.x client available from the RTC downloads page.  You can download an IBM Eclipse client from here http://www.ibm.com/developerworks/java/jdk/eclipse/index.html and add the RTC "p2 Install Repository" (from the RTC Downloads - All Downloads tab - https://jazz.net/downloads/rational-team-concert/releases/6.0.1?p=allDownloads) to it as you would with any Eclipse add-on: Help -> Install New Software..., add the location of the p2 download as an archive repository.