Linda,Here's another choice.I thought about this one for a long time a couple years ago,but they were having some problems getting the lowers machined with the person that was doing them,and have since changed shops from what I last heard.
I lost interest in the project,but still have it on the back burner.
CNCGUNSMITHING - www.cncguns.com - AR45
Click on the forum,and you can find out if this thing is getting produced now by anyone.I haven't looked in a long time.