When Mac Mini upgrades go bad

Well, I'm 2 for 3 in upgrading Mac Minis.

This time, I managed to break not one, but two of the heatsink retaining clips. I did manage to get the other two on opposite corners of the heatsink so it's on the CPU, but it can't be good...

Not only that, but I also managed somehow to make the internal speaker not work. Since I've got it connected up via TOSLINK to a stereo it doesn't really matter, but it's still sort of a downer.

So if anyone knows why the internal speaker isn't working or where one can get some more of those plastic-and-spring heat sink retaining clips (that are probably special to the Mini), let me know.