Hey bob,
As far as I know there are two guys that specialize in rebuilding these batteries.
Hybrid Battery Repair (been around a long time, active on this site, good reputation, out of NY)
Hybrid-Battery-Repair
Hybrid Revolt (had my battery rebuilt by them with a good experiance, here in Phoenix so I just dropped off battery so no shipping cost)
HybridReVolt: Hybrid Battery Repair
There may be more out there but these are the only two that I know of short of you doing it yourself. I thought about trying but getting matching sticks to replace the bad sticks are the problem there. All the sticks need to be balanced.
My car was down for 2 weeks while the battery got rebuilt and it sucked, good luck getting yours running again soon.