Protecting Slim PC from Dust

I have an eMachines Ultra-Slim (http://www.amazon.com/eMachines-Ultra-Slim-ER1401-57-Desktop-PC/dp/B00475OG9U) that I am really trying to protect from dust. This is in a room that is air conditioned and has several fans so dust is regularly blowing around and could affect the performance. I can't find anything that would fit this kind of portal desktop though.

http://www.computerdust.com/order.html
I've checked these, nothing would really do it. It doesn't have to fit the desktop perfectly, but if you look at the covers here, they are clearly designed for regular form factor desktops. I'm going to be covering the system while it's on and running, which StopShield claims to work well with. Everything else seems to be final or would not be ideal for a running machine:
http://www.amazon.com/Cables-Unlimi...8PYQ/ref=sr_1_2?ie=UTF8&qid=1309195833&sr=8-2
http://www.amazon.com/Aidata-System...4KVI/ref=sr_1_3?ie=UTF8&qid=1309195833&sr=8-3

Do you guys have any idea at all what I could do?