Oh, yeah, rebuilt batteries are available. I want to say the brand I got was a “Titan” but looking around online, the only hit I get is “GS Batteries,” and they’re only sold in the UK, by the look of their Distributor list.
I was in Eugene, Oregon, at the time, and bought the battery through a local part store; Kragen (now O’Reiley). It may have still been “Shucks” back then.
Actually — if you REALLY have the yen to do it:
http://www.ehow.com/how_5244691_rebuild-car-battery.html
Aha! I probably won’t retain the information (or understand a lot of it), but bookmarking for when I finish my work today. Thanks!