A character at Biotech 6 can regenerate nerves and muscles, bones and limbs. This leads me to believe that a Civilization with a similiar biotech level would have slightly better facilities. So instead of stopping aging, you could swap out nearly all your body parts (including bone, etc.) except your brain over time, cloned from DNA that's held in statis with full size Telomere strands.
Very barbaric and ineffectual, but I think it's possible.
I personally prefer some of the other methods mentioned, but I know jack shit about biology.