Hey man, yeah I've been searching the old version of Lugaru for a while and I just only found the demo version. Well, it's not the full version, BUT it's the 2005 version of the game so... It's the best I can do.
Just have to click the "Download now" button and you should get a "LugaruSetup.exe" file

Game link: https://www.moddb.com/games/lugaru-the-rabbits-foot/downloads/lugaru-the-rabbits-foot-demo

edit: nope i found the full version
but you have to register the code for the full game (which is in the game menu
while you're quitting the game)
And don't worry i have the code

Register name & Code:
Username: crusher98
Register code: 8590-2571-5742-1969

have fun ^^