dude, just get the new key from ebay at $14.99 shipped and cut it for free at dealer for free (based on your VIN, they can't charge you if you bring your own blank key) or at Home Depot (they make a free copy of what you got if you bring own blank key):
http://cgi.ebay.com/ebaymotors/99-00...Q5fAccessories
it looks like real original (with transponder)
this key has a blank transponder in it, don't worry about it. if you had an immobilizer you can program it, if you don't than just ignore it.
new key fob you get from ebay too, if your alarm was dealer installed option (not factory) then your key fob is
bab237131-022 (GRAY, not black), usually at no more than $40 shipped :
http://shop.ebay.com/i.html?_nkw=bab...1&_from=&_ipg=
programming instructions will be usually send together with it (check with seller), it requires removing the center arm rest console as the alarm ECU is below it. you will need to unbolt it (don't unplug anything) and press the green button on it to enter programming mode and add new key fob by pressing the top button on it.
have fun