If you've still got the PC then just use it to restore the files to an external USB hard drive or flash memory stick. If the PC doesn't have any USB connectors then you can get a PCI-to-USB adapter card for $15 to $20. Once you've got it on a USB device you can plug it into another computer with a DVD burner to burn the files to a DVD.
Even if you don't have a DVD burner of your own (they're also very cheap BTW), you'll have a lot easier time finding someone who can burn stuff from a USB device than from a tape cartridge.