I just ran across these Amazon.com: Seagate 600 Pro ST240FP0021 240GB 2.5-Inch Internal Solid State Drive: Computers & Accessories. This is not a drive I watch for, so I'm not sure how great the price is, but the only others I found were much more. And they do have a power capacitor. After fiddling with the cart a bit, I was able to deduce the vendor has 72 in stock, so there should be plenty for anybody who is interested.