Well, it's not generic but the Amazon Kindle AC/USB charger works with the Sony readers. I had been using my Blackberry charger but having cords & parrots can sometimes be a dangerous combination. My littlest one chomped the cord. Thankfully it wasn't plugged in & she's fine but I had to buy a new one.
I noticed that the official Sony one looked identical to the Kindle one but the Kindle one is $10 cheaper. I bought it & it works!! It charges the Kindle, the Sony & even my Blackberry. It also has the added benefit of being white if anyone prefers it to the black ones. Just thought I'd share.
Kindle AC/USB Charger