gibc5363

Hi I am new to this forum and I was trying to find a post on this and I couldn't find one. I bought a laptop and it has vista installed on it, however no Vista cd. Is there a way to create one so I can do a clean install, wipe the hard drive clean and re-install vista. I have the product key as well. Any ideas? If there is a post can you point me in the right direction? Thanks