Try the maker.
ati
http://www.e-gunparts.com/productschem.asp?chrMasterModel=0840z500
One was purchased new in 1974.
The model 5100 Stevens shotgun has a plastic stock
You can buy wooden clipboards in bulk at bulkofficesuplly.com. THey have a wide range of office supplies in stock. Their website is: http://www.bulkofficesupply.com/clipboards.aspx
The Mossberg 500 Stock is the stock for the Mossberg 500 shotgun. The stock would allow you to get a better grip on the shotgun and absorb some recoil from firing the shotgun.
The stock...some have two piece wooden stocks - called fore stock and butt stock.
You can purchase wooden toy chests at any local toy store, they usually have some on stock or you can buy it online at Amazon, who might have them with discounts.
I need a stock for a 16 gauge WP Wonder shotgun singleshot?
Wooden dowel
Stock with a raised cheekpiece.
between the stock and the barrel