If you download the "keys" that is a "house"" for everything from Lost in 70, except for the mentioned organ which is VST/AU. The "keys" has no sound itself but you can download a handfull of different keytypes and place it in a rather unfamiliar place on your computer. Open the "keys" and see where it suggest you to put the presets. You can do it elsewhere but for future updates it is alway best to use the suggested folder, which in this case is in the VST or au file itself. Use right click and show content and you will get there. All these sounds are free and pretty decent.