You want it… you’ve got it thanks to Clark Dastardly for these links.
Solaris X86
https://solaris-sl-viewer.s3.amazonaws.com/SecondLife_i686_1_19_1_4-2008Apr07-s10.pkg.bz2
Solaris Nevada (Open Solaris)
https://solaris-sl-viewer.s3.amazonaws.com/SecondLife_i686_1_19_1_4-2008Apr07-snv.pkg.bz2
Download, extract and use
pkgadd -d FILENAME to extract. Remember to do SU so you are logged in as ROOT.
Then Navigate to opt\secondlife\bin
and run
./secondlife
You may need to adjust your graphics settings, also turn OFF avatar imposters if you get a black box.