hey.. i had a similar problem.. what i did to solve it (inexpensively) was freeze big cups of water, so that they were larger cubes and didn't melt as quickly.. and placed them in an open cooler/lunchbox thing and put a fan blowing over the top of them.. lowered the temperature 7 degrees no joke..100 + is kinda high though.. if necessary you can build a little jimmy rigged air conditioner out of copper & plastic tubing, a tiny water pump, and a fan.. thats if you want to get really innovative though.. it's not hard though, if your interested let me know or even just look it up on the internet.. you'll be able to find a video i'm sure.. good luck!
ps: the ice cube thing will raise your humidity a bit, so be prepared for that..