There is an NRA shadow 1000. The SCI Hunter Defense is similar, but it is for the Safari Club International. Unlike the NRA Shadow the CFX does not have any brass inlayed symbols or special serial numbers. It is a CFX 2-7x32 combo with a Safari Club International hat tack, some of the proceeds go to SCI.
It used to be easier to find on GamoUSA, but now I think you have to search for 'SCI' specifically to bring it up.
There is now logical reason why it is cheaper than the normal combo, other than a negotiation w/ SCI.
Also, the Cabela's combo w/ the 4 power scope is, I believe, only sold by Cabela's. All other CFX combos include 2-7x32 scopes.