You can get something like this for cooling memory: http://www.scan.co.uk/products/corsair-cmxaf2-airflow-fan-for-up-to-6-x-modules-cooling-ddr1-2-3
I've personally not heard of a computer shutting down from overheating / bad RAM before - I think you'd be more likely to get a BSOD if this was the issue. Computers do shutdown to protect themselves from an overheating CPU. What temperatures are you reaching there, when it's at 100%? It could be that whatever application your company is running on this machine is too much for its CPU.