I've had that one for years and the manufacturer S & T wood crafts appears to have gone out of business in the 80's. I found another one for sale on fleabay....
Mods > i'm not sure if you're allowing us to link ebay sales. Please if this breaks the forum rules just remove this post.
http://www.ebay.com/itm/Vintage-Doub...item35e5203fad