While digging through some old computer crap I had laying around, I came across this cable, which is a perfect match for the Aerogarden lamp hood, just as Vand had figured out. I figured other people would want to know more info about this kind of cord, so ..
The name for this kind of connector end is called a "figure eight", and is a pretty common type of cord from what it seems. Nothing crazy or propriatary.
Here is a link to purchase the cable from any Radio Shack in your local area:
RadioShack.com - Power & Batteries: Extension & power cords: 6-Ft. AC Power Cord
Also, they have a simple appliance timer there too that you'll need so you can set the light cycle for flowering:
RadioShack.com - Home & Office: Clocks & watches: Mini Plug-In Lamp/Appliance Timer
I walked out of RadioShack for less than $20, and everything is working beautifully with the base unit set to "salad greens" (which keeps the nutrients/pumps running 24/7) , and set the timer to set the lights on an 18/6 cycle.