here are some really cheap fans from amazon.com. I just bought both of these for my setup and they are good. I keep one pointing straight up at my HPS and the other oscillating around the closet on low. these little fans are powerful. you can get them shipped for free inside the us as long as you have 10 days to wait.

Honeywell-HT800-Super-Turbo-Performance $12.99

Honeywell-HFT114B-Oscillating-Base-Turbo $16.88

=$29.87 total with free shipping