you can get the steam version for a few bucks.. I got a vanilla version of steam's silent hunter 3 on my second hard disk. I don't remember exactly how to 'decouple' silent hunter 3 from steam anymore, though. I think I either used h.sie's patch or that other tool which allows you to create multiple copies of the game.
theoretically, i could upload the 2.43 GB vanilla version to mediafire for you to download
edit:
As long as you use h.sie's patch you can uninstall steam once you got sh3 on your hard disk..