CorelDRAW Graphics Suite 12 replacement file or disc.

I recently re-installed Windows 7 and need to re-install CorelDRAW Graphics Suite 12 purchased in 2009 but I no longer have the CD. I only have version 11 which cannot open my older files. 

Please, would it be possible for me to find help through a replacement file or disc for my old version 12?

Thank you.