There are many Links games. Which one are you looking for?
Links @ MobyGames
I believe that you'll have to buy it. Not sure, but I don't remember seing that game anywhere for download. I'm not much into golf, so I might just overlook it. (Only golf game that I play and like was Sensible Golf made by Sensible Software, company responsible for Sensible Soccer and Cannon Fodder.
