2004 Aveo Sedan Raise rear suspension?

Anyone have any ideas how to raise rear suspension with a replacement shock? I do not want to get into replacement springs, just the shock. Is there a longer shock to raise the rear end? This is not a racer just a grocery getter with occasional passengers that make the rear sag. 90K time for new shocks.
Thanks
JRR

Shocks don't determine ride height in this case. Springs do.

you can put a helper spring on the shock if you can find them, or buy a set of mk2 rear coilovers off someone here who is swapping out for mk1 rears, or the most ghetto way, put in air shocks and pump them up when you have guests.