The one you want is Kensington model # 33197. It comes with both wall and aircraft plugs, as well as a variety of adapters for different computers. If it doesn't have the adapter you need, Kensington will send you the correct one for free.



The specs are here:

http://us.kensington.com/html/13874.html

Buy.com has them for $115.97 with free shipping:

http://www.buy.com/prod/kensington-w...205147258.html

Buy.com is reliable, but this is a very common item and it's worth shopping around. I have three or four of them and they're terrific. I've found them on eBay for as little as $39.

I'd also recommend the retractable travel cable, as it doesn't get tangled:



Buy.com has this for $23.23 shipped:

http://www.buy.com/prod/travel-cable...202188853.html