I'm putting together my first watercooled rig this weekend...and I know that I have to take at least one of those out in the front of my case so that I can put my fan controller in. Those things are freakin delicate!!
If you're still interested, PM me and I'll let you know when I know for sure...they are actually really hard to take out without breaking the tabs on the side. I've already broken a couple of mine a couple years ago, but I think I already set those aside. I'll look at least for ya.