I am considering getting this relatively new product from Clearview Investments:  http://www.clearviewinvest.com/amd65buttstock.aspx#reviews
I have been using the steel cheek bar offered by AMD65tech.com and it really helps with the cheek weld for using the Aimpoint and co-witnessed iron sights.. However, it tends to jar these old teeth too much by concentrating the impact of the recoil.  I believe the Clearview product might remedy this somewhat.  However, I don't know anything about this product's sturdiness and overall quality.
I'd appreciate any shared cheek-on experience, thanks.
M

I bought one and replaced it with the AMD65tech riser.  The clearview can move, cannot fire when closed, and there is a decent size gap between the front of the stock and the back of the receiver.  Also, it's very thin.  Great concept though