Reinstall lost CD but have case/serial number

I have x5 installed on an older laptop and need to install on my new laptop with windows 7. I can not find my CD but I do have my case and serial number.  I also need to get the clip art that requires the disk to be installed to get. :/   What can I do ? I have only 1 install.  Thank you in advance!

 

 Stacey A.