i seen and printed one of these stocks hoping it would fit on my stryfe. sure enough it did.
http://www.thingiverse.com/thing:951505
here a pic of mine
as you see. the only issue is around the bottom of the grip. with some fill it should look fine.
another thing i thought, it does have a large packet in the back. this could be a good space for HV mods with large sized batteries.