Jayme,
I've just been through the same problem with my Eotech. Although a newcomer to the AR-15 world, here is some info I've come across.
First, mount on top of the A2 handle is undesirable. It is considered too far from the bore axis.
I purchased the ARMS 39A2 mount, and it is the real deal. It has a bolt for the hole in the handle top, and a clamp which fits to the front of the handle. Solid as a rock.
However, it was developed for the Aimpoint. When the Eotech came along later, you cannot see the front iron sights through the view, and cannot co-witness, of course.
That's no problem to me. I wasn't especially concerned about co-witness anyway.
Please examine the link below. You will see that the mount is recommended by Eotech, apparently. I'm concerned that it only uses one bolt.
http://www.skdtac.com/item.asp?ItemID=SKD2103&PRICE=119.95&CategoryNum=169
You could also send an email, or call Eotech or SKD, etc.
Hope this helps.
I forgot to mention: If I were more experienced, I would have acquired another upper with a flat top, but have no mechanical ability, etc.
Bill