I got at the capacitor (which I deliberately left off overnight and also discharged just in case). No signs of charring either there or on any of the wires. Without actually charging it up and testing it, I'd say it looks fine. My (limited) familiarity with electronics is all in computer circuits and low voltages, not with high voltages and power supplies. For that reason, I think I'm not going to go any further in testing the components.

Chan, thanks for the bit about the voltage regulation coming from the battery -- I hadn't thought that through all the way.

Tkamiya -- if you come up with anything that might work, I'd be happy to hear. Might cruise some craigslist too and see if I cant find something that might suffice.