EZ-B v3 Servo Info
You may be able to add a fan to the EZ-B's internal VR heatsink - as i usually do and many others on here. A small 3cm fan works great. Here is a photo of how I usually do it. Keep in mind, the VR on the LEFT of the PCB (closest to the power connector) is the VR you wish to cool the most. I power 12 servos in a biped and hexapod using a small 5volt 3cm fan.
Here is a link to the fan on eBay: