As mentioned by the OP It is available from UNIX Packages
Yes you have to pay for our service to compile then, but you do have the advantage that the packages are compiled by folks that have been doing this for over 20 years for the Solaris community, and they come with some level of support and provide all the required dependencies too
Note that the latest version 1.0.1.g that provides the Heatbleed fix was posted up for Solaris 8 - 11 on April 8.
Regards
Colin