Made a great pawnshop buy today. Found this Laurona Eibar with an amazing stock. Not sure who the stock was fitted for but it fits my skinney butt great. Oh- I gave $325 for it.
Appears to be custom wood.
A quick Wisenut search brought up five hits with the best being what appears to be a company website http://www.gcshooters.com.au/shotguns.htm