What hardware do I need to fix this toy chest?

I have a lovely old solid wood toy chest acquired from a garage sale. The lid lifts up and doubles as a bench when closed. It is missing the hardware that attaches the lid to the box. A trip to the hardware store led me to purchase this:

http://www.google.com/products/catalog?hl=en&client=safari&rls=en&q=spring+lid+support&bav=on.2,or.r_gc.r_pw.,cf.osb&biw=1849&bih=919&um=1&ie=UTF-8&tbm=shop&cid=15392219870072766794&sa=X&ei=pIWLTvrIH9SDsgKa1bHOBA&ved=0CEgQ8wIwAA#ps-sellers

I believe it is close to the right thing as the original drill holes in the box and lid are in the exact right place. However, this hinge is too long. When the lid is closed, there is a two-inch gap between it and the back of the box. An internet search has yielded no results for a similar product that is shorter (the one I have is about 6 inches long). Any advice/help finding the right thing? Ace hardware only carries the one length.