APC also makes in rack aircon units, but like all similar solutions, its not cheap.
Panduit also makes cooling units, but they are even more expensive.
What you actually should be doing is moving those people away from your racks, it's bad practice because its a security risk and also a general business risk. Any of those people or their friends that stop by the office can plug a USB in your servers or accidentally trip the power/unplug cables.
If you have the money for in rack aircon, then you have the money to get a proper server room.