All download options of RTC 3.0.1.2 are listed as unavailable.

 Same here but the IM repositories seem to be working

Here's the list I have you can just paste the one you want into installation manager under file -> preferences

You can get IM 1.6 here
http://www-01.ibm.com/support/docview.wss?uid=swg24032641


RTC 3.0.1.1

 https://jazz.net/downloads/rational-team-concert/3.0.1.1/3.0.1.1/install-repository/rtc-offerings/repository/repository.config

RTC 3.0.1.2

 https://jazz.net/downloads/rational-team-concert/3.0.1.2/3.0.1.2/install-repository/rtc-offerings/repository/repository.config

RTC 3.0.1.3

https://jazz.net/downloads/rational-team-concert/3.0.1.3/3.0.1.3/install-repository/rtc-offerings/repository/repository.config

RTC 3.0.1.4

https://jazz.net/downloads/rational-team-concert/3.0.1.4/3.0.1.4/install-repository/rtc-offerings/repository/repository.config

RTC 3.0.1.5

https://jazz.net/downloads/rational-team-concert/3.0.1.5/3.0.1.5/install-repository/rtc-offerings/repository/repository.config

RTC 4.0

https://jazz.net/downloads/rational-team-concert/4.0/4.0/install-repository/rtc-offerings/repository/repository.config

RTC 4.0.0.1

https://jazz.net/downloads/rational-team-concert/4.0.0.1/4.0.0.1/install-repository/rtc-offerings/repository/repository.config

RTC 4.0.1

https://jazz.net/downloads/rational-team-concert/4.0.1/4.0.1/install-repository/rtc-offerings/repository/repository.config


RTC 4.0.2
https://jazz.net/downloads/rational-team-concert/4.0.2/4.0.2/install-repository/rtc-offerings/repository/repository.config