2000 Blazer keyless entry question

I bought my Blazer last year and "had" a keyless remote that unlocked the doors and rear glass along with disarming the alarm. Well I lost the remote and I'm curious to know if it came stock with the truck?? Do I have to go back to the dealer to get another one or can I just buy a replacement?? Pleeeeeeeease let me know asap. Thank you.... Michelle

http://search.ebay.com/2000-blazer-keyless-remote_W0QQsofocusZbsQQsbrftogZ1QQfnuZ1QQfromZR10Q QsacatZ-1QQcatrefZC6QQsargnZ-1QQsaslcZ2QQftrtZ1QQftrvZ1QQfsopZ1QQfsooZ1QQcoacti onZcompareQQcopagenumZ1QQcoentrypageZsearch

I just bought one from ebay for $25. It works great and the programming instructions are accurate. DEFINATLY GET ONE OFF EBAY!!!! www.CarAndTruckRemotes.com