Disk 4 cracked - any way of loading the game?

Hi all. This week I went to load my FS4 Century game on my current Windows 10 desktop computer after many years in a drawer. Disk #4 has a crack and the install would not complete. I asked support where I could get a #4 disk and the response is that this game is long not offered support. Does anybody know of a download site where I could complete the download. During the install process I did receive a number which, I would think, is a licanse number. Any help on installing this game on my computer?