I can't remember ever having seen a hobby shop that actually stocked paint booths for airbrushing. I know of a couple of guys who special ordered a paint booth thru their LHS. I have however seen at least three hobby shops which had a used paint booth for sale - in fact I purchased mine used from a hobby shop in Junction City. The previous owner was stationed at Ft. Riley, been transfered overseas and couldn't take the booth with him. Got it for 50 bucks (which was only 5 bucks more than the fan I was going to buy for the booth I was planning to build).
If I lived where you do, I'd grab the Yellow Pages and start calling the hobby shops, paint/painting equipment supply stores and any paint gun/airbrush suppliers to find out if they stock/order new paint booths or have a used one for sale. Basically, nothing ventured, nothing gained.