Hey there, @morr.
Welcome to the QuickBooks Community. Allow me to get you steered in the right direction. You don't actually need an install disk for QuickBooks Desktop. You can download the installer from our download center, free of charge. I've included steps to follow down below:
For your reference, here is the article that covers installing QuickBooks Desktop: How to Install QuickBooks Desktop.
Once you've followed these steps, you will have successfully installed the desktop version. If you still would like a physical reinstall disk, I recommend calling into Customer Support. They can mail you a physical reinstall disk. The only charge will be for shipping and handling. You can find contact information here: Contact us. If you have any questions about this or anything else QuickBooks, feel free to reach out to me here in the Community. I'm always here to help.