help on A/C unit.

i just recently added a CO2 system to my room and to make it worthwhile i want to close the door on my grow room so it is better sealed and easier to control the ppm level.
with this causes high heat(in the 90's) cause i have a 400W light in a room thats 4x6.
where can i find a small AC unit that will fit in my already small and cramped room.
i already have 4 plants, a humidifier, a fan, and my co2 tank setup in the closet.

Where do you live, over here in australia you could usually find them at k-mart or big w, thats like the equivalent of Americas wal-mart i think.

where is the room located? do you have any common walls with a garage you cut out the drywall an mount a window ac unit like that, just gets more expensive if you cant unfortunately, they have portable but they take up good 2x3 of space or they have individual light chillers that work awesome but are not cheap. all of these can be found online or at home depot/lowes except the light chillers those are a web thing but those are a few g's to get running doubt your lookin for that in a closet grow. is your hood vented? that helps a lot too.

thanks for the tip but i took the plunge and bought a portable AC unit. it was the smallest i could find, it is 16in by 13in and is 10000 BTU, should be more than enough for my closet.
http://www.compactappliance.com/EdgeStar-Compact-10000-BTU-Portable-Air-Conditioner-AP10001B/AP10001B,default,pd.html?cgid=Air_Quality-Portable_Air_Conditioners