I got my fans from Radio Shack..cpu fans-they work great! They also have 4 "AA" battery holders, I run 4 AA batts for each fan. Rechargables are the way to go. I installed my fans on the stud thru my mic tips..works great! You'll need on/off switches, 1 for each fan, R.S should have some. You can see how my fans sit in my bucket under #177 in request EIB forum. I would post the link but not great at computer skills..sorry..hope any of this helps