I just bought a pneumatic 5" random orbital wet sander from harbor freight for about $50.
Not sure if they carry it anymore..can't find it on the net.
Here's a similar one.

http://www.amazon.com/Viking-Wet-Palm-Grip-Sander/dp/B000KL54XC

Also I duct tape the fat hose on my heavy duty shop vac to my dry sanders.

: All this and yet still my throat is killing me today. By the way,
: yes- that is a swim goggle but I couldn't find my safety goggles
: and I didn't want fiberglass dust in my eyes. Strong like bull,
: smart like tractor. The goggles proved to be a pain in the butt
: and soon came off. My eyes are actually okay, but my windpipe
: not so good. I have that scratchy throat feeling I usually get
: when NOT wearing a dust mask! I wore the mask all the way up
: literally to the shower, but still the dust found me. I give up.
: Dust wins.

: When I die and they say "Ashes to ashes, dust to dust..."
: they will not just be giving my last rights, but telling my life
: story!