Thank you for the suggestions.
John... I'm assuming with the Diamond mount you have run the antenna wire behind the door seal to the bottom of the door and then inside to where ever you need it. In my case it would be an internal antenna repeater, about the size of a large candybar.
Here is a picture of the bottom of the antenna I'm wishing to mount. Would it appear to you that I could mount this antenna and wire into the Diamond? I'm concerned with the antenna wire coming out the side of the base. There is also a spring adapter that could be mounted too. This looks like it might be the way to go.
Thanks!!!