Looking for older version of T3

I am using a Joomla Bamboo template, and there is a conflict with an extension DPCalendar. In the forum for DPCalendar someone else had the same issue, that a big blank popup window appeared on the home page with no way to send it away. So they were recommended to update to the latest T3 version at that time.

I contacted Joomla Bamboo support to confirm this would be a fix and not break the template since I'm so far along in development. I was told to get the latest 1.4.x, but not the latest 2.x version of T3, then compile Less to CSS. But I can't find where to download the latest 1.4.x version.

Can anyone point me in the right direction?

Thanks,
Pat Vanden Bosche