The full image can be downloaded here
http://h18004.www1.hp.com/products/servers/software/vmware/esxi-image.html
This image is no different that VMwares other than the Proliant wbem proverds have been added
For the add on bundle go to hp.com
Click support>download drivers
Enter your model and then select the version of vmware you are running.
Under Software - System Management you should see the bundle