Radio Code Help 2001 spyder

I have recently purchased an 01 spyder gt and i bought some aem cold air for it and instructions told me to disconnect the battery. well now i am having a problem with the code for the radio. I Dont Have One. I bought the car from a honda dealer and it didnt come with a manual or a card with the code. Is it possible to use someone elses code? How can i get my code?

I believe each radio has its own code..u can go to a mitsu dealer and I believe they can get a code for u through ur VIN #..hope that helps