Why not build your own?
Go to WalMart and buy a small RubberMade tub with a lid. Drill some 1 7/8" holes in the lid to accomadate as many 2" net pots as you need. Drill two small holes in the side of the tub, as high on the side as you can get, to accomadate the clears plastic air lines. Get two, six-inch airstones and one double outlet air pump, along with some clear plastic aquarium airlines. Put 1" cubes of RockWool into the netpots, put the airstones in the bottom of the tub, fill the tub with RO water until the solution comes up to about 1/4" from the bottom of the netpots, connect the pump, airlines and air stones. Turn everything on ... and walla! You now have a Cheapo AirCloner.
Everything listed above, except for the net pots and RockWool, can be purchased at WalMart for cheap. You'll find the air stones, pump and air lines in the aquarium section.
Honestly, I've been cloning this way for many years with almost a 100% success rate. Great for seedlings too.
Vi