Martmann,
Thanks for the reply. I thought I'd read every page in this thread but somehow missed that one.
Do you think that BS-03 would fit a 5.25" opening in the front of the case; maybe behind a BZ-501 bezel?
No, its too big to do that. However, you can make you own, using a 80mm fan instead of the 120mm size that the BS-03 uses.
Here's how they're made, you just have to adjust the size appropriately:
http://www.silentpcreview.com/forums/viewtopic.php?t=33328
Can make it out of aluminum instead of wood if you'd like, and just mount it in the 5.25" bay with grommets