Additional instruments won't download
I have Lion (10.7.3) and the latest Garage Band (6.0.5). I've had Garage Band installed for a long time.
I went to try it out today, and would like to install the software instruments that (apparently) aren't included on the DVD anymore. When I click on an instrument that isn't installed, it asks if I want to download them via Software Update. I select "download now" and click OK. Software Update opens and, after a very long time, tells me my software is up-to-date.
I've tried resetting ignored updates (I don't have any). I've tried reinstalling Garage Band from the iLife '11 DVD. Nothing seems to change. I still can't download the additional instruments via Software Update.
I also can't find any download reasource on Apple's Support site where I can download them manually. Most software updates can be downloaded as seperate installer, but this doesn't seem to be the case for the additional Garage Band instruments.
Can any one help?