CS4 install discs cloudy and not working properly

I bought the CS4 Production Premium years ago. It was right around the time CS5 was coming out, so Adobe offered CS5 upgrade discs for free. I just recently purchased a laptop and wanted to load the Production Premium onto it. When I pulled out the install discs that have been stored in the original plastic box they came in, I noticed the read side of the discs have all turned cloudy. No scratches, just cloudy. Upon installing, it gave me multiple read issues and I had to keep ejecting and starting over again because readability was difficult now that the discs are cloudy. Luckily, the CS5 upgrade discs were fine. I think because they were stored in sleeves inside the cardboard CS5 box, they held up. The CS4 discs were attached to plastic disc holders. I've attached a picture of one of the discs. The reflection is of my fan, but you can see the cloudiness spiraled around.

My question is can I receive replacement CS4 discs, or is there a downloadable DMG I can use, or is there a third alternative that will work as well?
Thanks for any help.