It's not exactly the same powersupply (it's 60 watts instead of 45, or 
whatever the original was), but it works and it's about $50 with 
shipping.

I'm not affiliated (except as a customer), but since it took me awhile 
to track down a supplier that had the supply with the correct connector 
already on the cable, I figured I'd pass on the information:
http://www.alliedelec.com/cart/partlookup.asp?ST=AS&PartNumber=688-5000
Or if that doesn't work, try their part lookup for Mfr's Part Number: 
ZVC60NT12AA

Robert