Such a thing as a self-powered 2.5" hdd caddy?

[blueharvester]

There are a multitude of USB-powered 2.5" hdd caddys out there, but I was wondering if it's possible to get a caddy that comes with a power adapter so that I can use it with my AirPort Extreme for Time Machine?

 

[Hellhammer]

There are some but there are even more if you get one which can take 2.5" and 3.5", more precisely an HD dock

 

[steve2112]

The OWC On-the-Go Pro is bus powered, but has an input for an AC adapter. If you scroll down the page a bit, you will see a link to order the adapter. You can get them with a wide variety of connectors (both Firewires and USB).