Started with a Sterlite storage bin, an 8" computer fan and a fan grill. I was walking through the hardware store and saw some aluminum angled stock, and a range filter. I also bought some silicone to seal it up. Some pop rivets I had on hand from another project, a couple of slow moving hours and a few changes, I finished it off.
I just used it for the first time, and it works great. The fan pulls enough air to hold the filter in place till I figure out an easy way to hold it in place. I think I did pretty well for less than $50. I still need to vent it outside, but I can do that pretty easy. Hopefully this will give someone else some ideas if they are going the same route.
Good for keeping out of the way:

Storage for my compressor and AB, plus some room to spare:

Top of unit:

Behind the filter:

The whole deal:














