As long as you own a physical copy, You can download a copy of the game to use. Once you have a downloaded copy, install DosBox found here:
http://www.dosbox.com/
If you have no experience with DosBox, also download DosShell found here:
http://download.cnet.com/DOSShell/3000-2344_4-75072926.html
After setting DosBox and DosShell, it will ask you to point it to the directory of the game. After doing this, you will be able to play your game.
*NOTE* You may want to confirm the legality of this. I am 99% sure you can legally download the game as long as you own a physical copy.
DosBox and DosShell both have thorough documentation on how to set them up. Follow these pieces of instruction and you will have no trouble.