Minecraft beta 1.5 server

Hello fellow minecraftians I have a small question for those of you out there that know a lot about servers. First off id like to ask if its even possible to get my hands on the server software needed to make a beta 1.5 server and if so where can i get it. If anyone knows where I can get one that's clean then please give me a link either by PM or through this post. Thanks in advance.

-infantry492