my sister tripped over the first rev of my UFO and the metal part where it plugs into the powerbook got snapped. Luckily i was under warranty, and apple at the time was recalling all bricks, so they sent me rev 2 UFO and i also got a free one at a local MacMall.
im not sure about the madsonline ones (although i do have their car charger for my powerbook, and it works wonderfully), but im sure any apple reseller would have the older UFO type ones in their backroom. i think they were valued around $60 when i got mine replaced.