How to share the AWS keys without people knowing about it

I have a use case where in I have installed a private instance of webpagetest http://ift.tt/gNGMPa on EC2 . Now I want to enable autoscaling of the webpagetest AMIs . Now for autoscaling the AMI , I need to mention the AWS secret key and access key here in the configuration. http://ift.tt/1BHTBKW

Now the team that handles AWS in my organization are hesitant to give me the keys.

Is there a work around for problem like this. Can the keys be shared in some other way.